List of the largest libraries in the United States
Encyclopedia
The American Library Association
American Library Association
The American Library Association is a non-profit organization based in the United States that promotes libraries and library education internationally. It is the oldest and largest library association in the world, with more than 62,000 members....

 maintains a list of the 100 largest libraries in the United States by volumes
Volume (publishing)
A volume is a single book that is part of a collection; also a bibliographic identifier for a sequence of periodicals....

 held. The ALA's list was last updated in July 2010, although much of the most recent data is from 2007-2008 report by the Association of Research Libraries
Association of Research Libraries
The Association of Research Libraries is an organization of the leading research libraries in North America. As of October 2006, it comprises 123 libraries at comprehensive, research-intensive institutions in the US and Canada that share similar missions, aspirations, and achievements...

 (academic institutions) and the 2009 Statistical Report of the Public Library Data Service.

A complication that arises when comparing the size of library
Library
In a traditional sense, a library is a large collection of books, and can refer to the place in which the collection is housed. Today, the term can refer to any collection, including digital sources, resources, and services...

 collections is the different definition of holdings or volumes used by public libraries
Public library
A public library is a library that is accessible by the public and is generally funded from public sources and operated by civil servants. There are five fundamental characteristics shared by public libraries...

 and academic
Academic library
An academic library is a library that is attached to academic institutions above the secondary level, serving the teaching and research needs of students and staff...

/research libraries
Research library
A research library is a library which contains an in-depth collection of material on one or several subjects . A research library will generally include primary sources as well as secondary sources...

. The Association of Research Libraries uses the National Information Standards Organization
National Information Standards Organization
The National Information Standards Organization is a United States non-profit standards organization that develops, maintains and publishes technical standards related to publishing, bibliographic and library applications. It was founded in 1939, incorporated as a not-for-profit education...

 definition of volume, which is "A single physical unit of any printed
Printing
Printing is a process for reproducing text and image, typically with ink on paper using a printing press. It is often carried out as a large-scale industrial process, and is an essential part of publishing and transaction printing....

, typewritten
Typewriter
A typewriter is a mechanical or electromechanical device with keys that, when pressed, cause characters to be printed on a medium, usually paper. Typically one character is printed per keypress, and the machine prints the characters by making ink impressions of type elements similar to the pieces...

, handwritten
Handwriting
Handwriting is a person's particular & individual style of writing with pen or pencil, which contrasts with "Hand" which is an impersonal and formalised writing style in several historical varieties...

, mimeographed, or processed work, distinguished from other units by a separate binding
Bookbinding
Bookbinding is the process of physically assembling a book from a number of folded or unfolded sheets of paper or other material. It usually involves attaching covers to the resulting text-block.-Origins of the book:...

, encasement, portfolio
Portfolio
Portfolio literally means "a case for carrying loose papers," ....

, or other clear distinction, which has been cataloged
Library catalog
A library catalog is a register of all bibliographic items found in a library or group of libraries, such as a network of libraries at several locations...

, classified, and made ready for use, and which is typically the unit used to charge circulation
Library circulation
Library circulation or library lending comprises the activities around the lending of library books and other material to users of a lending library. A circulation or lending department is one of the key departments of a library....

 transactions." In contrast, the Public Library Data Service Statistical Report (a publication of the Public Library Association, which is a division of the American Library Association) defines holdings as "the number of cataloged items (number of items, number of titles) plus paperback
Paperback
Paperback, softback or softcover describe and refer to a book by the nature of its binding. The covers of such books are usually made of paper or paperboard, and are usually held together with glue rather than stitches or staples...

s and videocassettes
Videotape
A videotape is a recording of images and sounds on to magnetic tape as opposed to film stock or random access digital media. Videotapes are also used for storing scientific or medical data, such as the data produced by an electrocardiogram...

 even if uncataloged."

The largest public library is the Library of Congress
Library of Congress
The Library of Congress is the research library of the United States Congress, de facto national library of the United States, and the oldest federal cultural institution in the United States. Located in three buildings in Washington, D.C., it is the largest library in the world by shelf space and...

 in Washington, D.C.
Washington, D.C.
Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution....

 (the de facto national library of the United States), with 32,818,014 volumes. The largest academic library is the Harvard University Library
Harvard University Library
The Harvard University Library system comprises about 90 libraries, with more than 16 million volumes. It is the oldest library system in the United States, the largest academic and the largest private library system in the world...

, with 16,250,117 volumes. The largest library outside of the continental United States is the Hawaii State Public Library System
Hawaii State Public Library System
The Hawaii State Public Library System is the only statewide public library system in the United States. The flagship Hawaii State Library, built in 1911 and designed by architect Henry D. Whitfield, was funded in part by industrialist and philanthropist Andrew Carnegie. It is a historic downtown...

, the statewide public library system of Hawaii
Hawaii
Hawaii is the newest of the 50 U.S. states , and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of...

, with 3,664,347 volumes, while the largest academic library outside the continental United States is the University of Hawaii at Manoa Library, with 3,533,671 volumes.
Number Institution Volumes Type Administration Source for
ALA data
1 Library of Congress
Library of Congress
The Library of Congress is the research library of the United States Congress, de facto national library of the United States, and the oldest federal cultural institution in the United States. Located in three buildings in Washington, D.C., it is the largest library in the world by shelf space and...

32,818,014 Public United States Congress
United States Congress
The United States Congress is the bicameral legislature of the federal government of the United States, consisting of the Senate and the House of Representatives. The Congress meets in the United States Capitol in Washington, D.C....

2 Boston Public Library
Boston Public Library
The Boston Public Library is a municipal public library system in Boston, Massachusetts, United States. It was the first publicly supported municipal library in the United States, the first large library open to the public in the United States, and the first public library to allow people to...

23,595,895 Public City of Boston
Boston
Boston is the capital of and largest city in Massachusetts, and is one of the oldest cities in the United States. The largest city in New England, Boston is regarded as the unofficial "Capital of New England" for its economic and cultural impact on the entire New England region. The city proper had...

3 Harvard University Library
Harvard University Library
The Harvard University Library system comprises about 90 libraries, with more than 16 million volumes. It is the oldest library system in the United States, the largest academic and the largest private library system in the world...

16,250,117 Academic Harvard University
Harvard University
Harvard University is a private Ivy League university located in Cambridge, Massachusetts, United States, established in 1636 by the Massachusetts legislature. Harvard is the oldest institution of higher learning in the United States and the first corporation chartered in the country...

4 New York Public Library
New York Public Library
The New York Public Library is the largest public library in North America and is one of the United States' most significant research libraries...

15,348,427 Public Private Non-profit
Non-profit organization
Nonprofit organization is neither a legal nor technical definition but generally refers to an organization that uses surplus revenues to achieve its goals, rather than distributing them as profit or dividends...

 with majority of funding from city government
Government of New York City
The government of New York City is organized under the City Charter and provides for a "strong" mayor-council system. The government of New York is more centralized than that of most other U.S...

.
5 Yale University Library
Yale University Library
Yale University Library is the library system of Yale University in New Haven, Connecticut, United States. It is the second-largest academic library in the North America, with approximately 12.5 million volumes housed in 20 buildings on campus...

12,519,514 Academic Yale University
Yale University
Yale University is a private, Ivy League university located in New Haven, Connecticut, United States. Founded in 1701 in the Colony of Connecticut, the university is the third-oldest institution of higher education in the United States...

6 University of Illinois at Urbana–Champaign Library 11,686,060 Academic University of Illinois at Urbana–Champaign
7 University of California, Berkeley Libraries 11,087,687 Academic University of California, Berkeley
University of California, Berkeley
The University of California, Berkeley , is a teaching and research university established in 1868 and located in Berkeley, California, USA...

8 Columbia University Libraries 10,296,816 Academic Columbia University
Columbia University
Columbia University in the City of New York is a private, Ivy League university in Manhattan, New York City. Columbia is the oldest institution of higher learning in the state of New York, the fifth oldest in the United States, and one of the country's nine Colonial Colleges founded before the...

9 University of Texas Libraries 9,447,434 Academic University of Texas at Austin
University of Texas at Austin
The University of Texas at Austin is a state research university located in Austin, Texas, USA, and is the flagship institution of the The University of Texas System. Founded in 1883, its campus is located approximately from the Texas State Capitol in Austin...

10 Public Library of Cincinnati and Hamilton County
Public Library of Cincinnati and Hamilton County
The Public Library of Cincinnati and Hamilton County is among the largest and busiest public library systems in the world. In addition to its Main Library location in downtown Cincinnati, Ohio, PLCH operates 41 regional and branch locations throughout Hamilton County., the PLCH's collection holds...

9,261,259 Public Hamilton County, Ohio
Hamilton County, Ohio
As of 2000, there were 845,303 people, 346,790 households, and 212,582 families residing in the county. The population density was 2,075 people per square mile . There were 373,393 housing units at an average density of 917 per square mile...

11 University of Michigan Library
University of Michigan Library
The University of Michigan University Library in Ann Arbor, Michigan, is one of the largest university library systems in the United States. The system, consisting of 19 separate libraries in 11 buildings, altogether holds over 9.55 million volumes, with the collection growing at the rate of...

9,175,102 Academic University of Michigan
University of Michigan
The University of Michigan is a public research university located in Ann Arbor, Michigan in the United States. It is the state's oldest university and the flagship campus of the University of Michigan...

12 Indiana University Libraries 8,723,253 Academic Indiana University Bloomington
Indiana University Bloomington
Indiana University Bloomington is a public research university located in Bloomington, Indiana, in the United States. IU Bloomington is the flagship campus of the Indiana University system. Being the flagship campus, IU Bloomington is often referred to simply as IU or Indiana...

13 University of Chicago Library
University of Chicago Library
University of Chicago Library is the library of the University of Chicago, located on the university's campus in Chicago, Illinois, USA. It is one of the largest university libraries in the United States....

8,597,159 Academic University of Chicago
University of Chicago
The University of Chicago is a private research university in Chicago, Illinois, USA. It was founded by the American Baptist Education Society with a donation from oil magnate and philanthropist John D. Rockefeller and incorporated in 1890...

14 Stanford University Libraries and Academic Information Resources 8,500,000 Academic Stanford University
Stanford University
The Leland Stanford Junior University, commonly referred to as Stanford University or Stanford, is a private research university on an campus located near Palo Alto, California. It is situated in the northwestern Santa Clara Valley on the San Francisco Peninsula, approximately northwest of San...

15 University of California, Los Angeles Library 8,393,910 Academic University of California, Los Angeles
University of California, Los Angeles
The University of California, Los Angeles is a public research university located in the Westwood neighborhood of Los Angeles, California, USA. It was founded in 1919 as the "Southern Branch" of the University of California and is the second oldest of the ten campuses...

16 Cornell University Library
Cornell University Library
The Cornell University Library is the library system of Cornell University. In 2010 it held 8 million printed volumes in open stacks, 8.5 million microfilms and microfiches, more than of manuscripts, and close to 500,000 other materials, including motion pictures, DVDs, sound recordings, and...

8,141,781 Academic Cornell University
Cornell University
Cornell University is an Ivy League university located in Ithaca, New York, United States. It is a private land-grant university, receiving annual funding from the State of New York for certain educational missions...

17 University of Wisconsin–Madison Libraries 8,059,335 Academic University of Wisconsin–Madison
University of Wisconsin–Madison
The University of Wisconsin–Madison is a public research university located in Madison, Wisconsin, United States. Founded in 1848, UW–Madison is the flagship campus of the University of Wisconsin System. It became a land-grant institution in 1866...

18 County of Los Angeles Public Library
County of Los Angeles Public Library
-Library System:The County of Los Angeles Public Library is the 4th largest public library system in the United States which serves residents living in 51 of the 88 incorporated cities of Los Angeles County, California...

7,488,196 Public Los Angeles County, California
Los Angeles County, California
Los Angeles County is a county in the U.S. state of California. As of 2010 U.S. Census, the county had a population of 9,818,605, making it the most populous county in the United States. Los Angeles County alone is more populous than 42 individual U.S. states...

19 University of Washington Libraries
University of Washington Libraries
The University of Washington Libraries are among the largest academic research libraries in North America and winner of the 2004 "Excellence in Academic Libraries Award"...

7,409,221 Academic University of Washington
University of Washington
University of Washington is a public research university, founded in 1861 in Seattle, Washington, United States. The UW is the largest university in the Northwest and the oldest public university on the West Coast. The university has three campuses, with its largest campus in the University...

20 Detroit Public Library
Detroit Public Library
The Detroit Public Library is the second largest library system in Michigan by volumes held , and is the 20th largest library system in the United States. It is composed of a Main Library on Woodward Avenue, which houses DPL administration offices, and twenty-three branch locations across the city...

7,366,782 Public "Independent municipal corporation
Municipal corporation
A municipal corporation is the legal term for a local governing body, including cities, counties, towns, townships, charter townships, villages, and boroughs. Municipal incorporation occurs when such municipalities become self-governing entities under the laws of the state or province in which...

" with library commissioners
appointed by the Detroit Public Schools
Detroit Public Schools
Detroit Public Schools is a school district that covers all of the city of Detroit, Michigan, United States. The student population of the Detroit Public Schools is about 65,971 , which is down about 9.7% from the previous school year. Detroit Public Charter Schools educate an additional 56,000...

 Board of Education.
21 Princeton University Library
Princeton University Library
Princeton University Library is the main library system of Princeton University. With holdings of more than 7 million books, 6 million microforms, and 37,000 linear feet of manuscripts, it is headquartered in the Harvey S...

6,941,254 Academic Princeton University
Princeton University
Princeton University is a private research university located in Princeton, New Jersey, United States. The school is one of the eight universities of the Ivy League, and is one of the nine Colonial Colleges founded before the American Revolution....

22 University of Minnesota Libraries 6,877,699 Academic University of Minnesota
University of Minnesota
The University of Minnesota, Twin Cities is a public research university located in Minneapolis and St. Paul, Minnesota, United States. It is the oldest and largest part of the University of Minnesota system and has the fourth-largest main campus student body in the United States, with 52,557...

23 Queens Borough Public Library
Queens Borough Public Library
The Queens Library, also known as the Queens Borough Public Library, is the public library for the Borough of Queens and one of three library systems serving New York City. It was the No. 1 library system in the United States by circulation, having loaned 21 million items in the 2007 fiscal year.It...

6,609,444 Public Autonomous, with trustees appointed by city officials
and majority of funding from city government
Government of New York City
The government of New York City is organized under the City Charter and provides for a "strong" mayor-council system. The government of New York is more centralized than that of most other U.S...

.
24 University of North Carolina at Chapel Hill Library 6,526,824 Academic University of North Carolina at Chapel Hill
University of North Carolina at Chapel Hill
The University of North Carolina at Chapel Hill is a public research university located in Chapel Hill, North Carolina, United States...

25 Ohio State University Libraries 6,285,446 Academic Ohio State University
Ohio State University
The Ohio State University, commonly referred to as Ohio State, is a public research university located in Columbus, Ohio. It was originally founded in 1870 as a land-grant university and is currently the third largest university campus in the United States...

26 Los Angeles Public Library
Los Angeles Public Library
The Los Angeles Public Library system serves the residents of Los Angeles, California, United States. With over 6 million volumes, LAPL is one of the largest publicly funded library systems in the world. The system is overseen by a Board of Library Commissioners with five members appointed by the...

6,219,060 Public City of Los Angeles
Los Ángeles
Los Ángeles is the capital of the province of Biobío, in the commune of the same name, in Region VIII , in the center-south of Chile. It is located between the Laja and Biobío rivers. The population is 123,445 inhabitants...

27 University of Pennsylvania Libraries 6,096,592 Academic University of Pennsylvania
University of Pennsylvania
The University of Pennsylvania is a private, Ivy League university located in Philadelphia, Pennsylvania, United States. Penn is the fourth-oldest institution of higher education in the United States,Penn is the fourth-oldest using the founding dates claimed by each institution...

28 Duke University Libraries 5,950,442 Academic Duke University
Duke University
Duke University is a private research university located in Durham, North Carolina, United States. Founded by Methodists and Quakers in the present day town of Trinity in 1838, the school moved to Durham in 1892. In 1924, tobacco industrialist James B...

29 University of Arizona Libraries 5,722,280 Academic University of Arizona
University of Arizona
The University of Arizona is a land-grant and space-grant public institution of higher education and research located in Tucson, Arizona, United States. The University of Arizona was the first university in the state of Arizona, founded in 1885...

30 Chicago Public Library
Chicago Public Library
The Chicago Public Library is the public library system that serves the City of Chicago in Illinois. It consists of 79 branches, including a central library, two regional libraries, and branches distributed throughout the city....

5,721,334 Public City of Chicago
Chicago
Chicago is the largest city in the US state of Illinois. With nearly 2.7 million residents, it is the most populous city in the Midwestern United States and the third most populous in the US, after New York City and Los Angeles...

31 University of Pittsburgh Library System 5,657,403 Academic University of Pittsburgh
University of Pittsburgh
The University of Pittsburgh, commonly referred to as Pitt, is a state-related research university located in Pittsburgh, Pennsylvania, United States. Founded as Pittsburgh Academy in 1787 on what was then the American frontier, Pitt is one of the oldest continuously chartered institutions of...

32 University of Virginia Library 5,532,266 Academic University of Virginia
University of Virginia
The University of Virginia is a public research university located in Charlottesville, Virginia, United States, founded by Thomas Jefferson...

33 Dallas Public Library
Dallas Public Library
The Dallas Public Library system serves as the municipal library system of the city of Dallas, Texas .-History:In 1899, the idea to create a free public library in Dallas was conceived by the Dallas Federation of Women's Clubs, led by president Mrs. Henry Exall. She helped raise US$11,000 from...

5,462,742 Public
34 Pennsylvania State University Libraries 5,354,645 Academic Pennsylvania State University
Pennsylvania State University
The Pennsylvania State University, commonly referred to as Penn State or PSU, is a public research university with campuses and facilities throughout the state of Pennsylvania, United States. Founded in 1855, the university has a threefold mission of teaching, research, and public service...

35 University of Oklahoma Libraries 5,299,924 Academic University of Oklahoma
University of Oklahoma
The University of Oklahoma is a coeducational public research university located in Norman, Oklahoma. Founded in 1890, it existed in Oklahoma Territory near Indian Territory for 17 years before the two became the state of Oklahoma. the university had 29,931 students enrolled, most located at its...

36 New York University Libraries 5,073,286 Academic New York University
New York University
New York University is a private, nonsectarian research university based in New York City. NYU's main campus is situated in the Greenwich Village section of Manhattan...

37 Michigan State University Libraries
Michigan State University Libraries
Michigan State University Libraries comprise the 29th largest academic library system in North America with over 4.9 million volumes and 6.7 million microforms. A unit of Michigan State University, the library system comprises nine branch locations including the main library...

4,994,033 Academic Michigan State University
Michigan State University
Michigan State University is a public research university in East Lansing, Michigan, USA. Founded in 1855, it was the pioneer land-grant institution and served as a model for future land-grant colleges in the United States under the 1862 Morrill Act.MSU pioneered the studies of packaging,...

38 University of Iowa Libraries 4,949,636 Academic University of Iowa
University of Iowa
The University of Iowa is a public state-supported research university located in Iowa City, Iowa, United States. It is the oldest public university in the state. The university is organized into eleven colleges granting undergraduate, graduate, and professional degrees...

39 Hennepin County Library
Hennepin County Library
Hennepin County Library is a library system serving the entire population of Hennepin County, Minnesota, USA. The Minneapolis Public Library, a separate system for Minneapolis, existed from its founding by T. B. Walker in 1885 until January 2008...

4,927,693 Public
40 Northwestern University Library
Northwestern University Library
The Northwestern University Library is the principal library for the Evanston campus of Northwestern University. The library holds 4.6 million volumes, making it the 11th largest library at a private university. The building was designed in brutalist style by Walter Netsch of Skidmore, Owings and...

4,842,949 Academic Northwestern University
Northwestern University
Northwestern University is a private research university in Evanston and Chicago, Illinois, USA. Northwestern has eleven undergraduate, graduate, and professional schools offering 124 undergraduate degrees and 145 graduate and professional degrees....

41 Free Library of Philadelphia
Free Library of Philadelphia
The Free Library of Philadelphia is the public library system serving Philadelphia, Pennsylvania.-History:History of the Free Library of Philadelphia: Initiated by the efforts of Dr...

4,642,094 Public
42 University of Georgia Libraries 4,637,291 Academic University of Georgia
University of Georgia
The University of Georgia is a public research university located in Athens, Georgia, United States. Founded in 1785, it is the oldest and largest of the state's institutions of higher learning and is one of multiple schools to claim the title of the oldest public university in the United States...

43 Cleveland Public Library
Cleveland Public Library
The Cleveland Public Library was founded in 1869 and is located in Cleveland, Ohio. It operates the Main Library on Superior Avenue in downtown Cleveland, 28 branches throughout the city, a mobile library, a Public Administration Library in City Hall, and a library for the blind and physically...

4,635,819 Public
44 Rutgers University Libraries 4,529,396 Academic Rutgers University
Rutgers University
Rutgers, The State University of New Jersey , is the largest institution for higher education in New Jersey, United States. It was originally chartered as Queen's College in 1766. It is the eighth-oldest college in the United States and one of the nine Colonial colleges founded before the American...

45 Arizona State University Libraries 4,422,239 Academic Arizona State University
Arizona State University
Arizona State University is a public research university located in the Phoenix Metropolitan Area of the State of Arizona...

46 University of Florida
University of Florida
The University of Florida is an American public land-grant, sea-grant, and space-grant research university located on a campus in Gainesville, Florida. The university traces its historical origins to 1853, and has operated continuously on its present Gainesville campus since September 1906...

 George A. Smathers Libraries
George A. Smathers Libraries
The University of Florida's George A. Smathers Libraries, is one of the largest university library systems in the United States. The system includes eight of the nine libraries of the University of Florida and provides primary support to all academic programs except those served by the Lawton...

4,288,118 Academic University of Florida
University of Florida
The University of Florida is an American public land-grant, sea-grant, and space-grant research university located on a campus in Gainesville, Florida. The university traces its historical origins to 1853, and has operated continuously on its present Gainesville campus since September 1906...

47 University of Kansas Libraries 4,235,542 Academic University of Kansas
University of Kansas
The University of Kansas is a public research university and the largest university in the state of Kansas. KU campuses are located in Lawrence, Wichita, Overland Park, and Kansas City, Kansas with the main campus being located in Lawrence on Mount Oread, the highest point in Lawrence. The...

48 Washington University Libraries
Washington University Libraries
Washington University Libraries is the library system of Washington University in St. Louis. With 14 libraries and over 4.2 million volumes, it is the largest library system in the state of Missouri. The John M...

4,224,113 Academic Washington University in St. Louis
Washington University in St. Louis
Washington University in St. Louis is a private research university located in suburban St. Louis, Missouri. Founded in 1853, and named for George Washington, the university has students and faculty from all fifty U.S. states and more than 110 nations...

49 Miami-Dade Public Library System 4,199,940 Public Miami-Dade County, Florida
Miami-Dade County, Florida
Miami-Dade County is a county located in the southeastern part of the state of Florida. As of 2010 U.S. Census, the county had a population of 2,496,435, making it the most populous county in Florida and the eighth-most populous county in the United States...

50 University of Southern California Libraries
University of Southern California libraries
The libraries of the University of Southern California are among the oldest private academic research libraries in California. For more than a century USC has been building collections in support of the university's teaching and research interests. Especially noteworthy collections include American...

4,084,284 Academic University of Southern California
University of Southern California
The University of Southern California is a private, not-for-profit, nonsectarian, research university located in Los Angeles, California, United States. USC was founded in 1880, making it California's oldest private research university...

51 Louisiana State University Libraries 4,082,803 Academic Louisiana State University
Louisiana State University
Louisiana State University and Agricultural and Mechanical College, most often referred to as Louisiana State University, or LSU, is a public coeducational university located in Baton Rouge, Louisiana. The University was founded in 1853 in what is now known as Pineville, Louisiana, under the name...

52 Brigham Young University
Brigham Young University
Brigham Young University is a private university located in Provo, Utah. It is owned and operated by The Church of Jesus Christ of Latter-day Saints , and is the United States' largest religious university and third-largest private university.Approximately 98% of the university's 34,000 students...

 Harold B. Lee Library
Harold B. Lee Library
The Harold B. Lee Library , located in Provo, Utah, is the main academic library of Brigham Young University, the largest religious and second-largest private university in the United States. The library has approximately of shelving for the more than 6 million items in its various collections, as...

4,080,079 Academic Brigham Young University
Brigham Young University
Brigham Young University is a private university located in Provo, Utah. It is owned and operated by The Church of Jesus Christ of Latter-day Saints , and is the United States' largest religious university and third-largest private university.Approximately 98% of the university's 34,000 students...

53 Brooklyn Public Library
Brooklyn Public Library
The Brooklyn Public Library is the public library system of the borough of Brooklyn in New York City. It is the fifth largest public library system in the United States. Like the two other public library systems in New York City, it is an independent nonprofit organization that is funded by the...

4,019,226 Public Independent nonprofit, with majority of trustees appointed
by city officials and majority of funding by city government
Government of New York City
The government of New York City is organized under the City Charter and provides for a "strong" mayor-council system. The government of New York is more centralized than that of most other U.S...

.
54 North Carolina State University Libraries 3,981,278 Academic North Carolina State University
North Carolina State University
North Carolina State University at Raleigh is a public, coeducational, extensive research university located in Raleigh, North Carolina, United States. Commonly known as NC State, the university is part of the University of North Carolina system and is a land, sea, and space grant institution...

55 Houston Public Library
Houston Public Library
Houston Public Library is the public library system serving Houston, Texas, United States. The library system has its headquarters in the Marston Building in Neartown Houston.-History:It can trace its founding to the Houston Lyceum in 1854...

3,951,035 Public City of Houston
56 Texas A&M University Libraries
Texas A&M University Libraries
The Texas A&M University Libraries support the teaching, research, and outreach missions of Texas A&M University through leadership in acquiring, managing, and delivering information in an environment that fosters learning and inquiry...

3,933,535 Academic Texas A&M University
Texas A&M University
Texas A&M University is a coeducational public research university located in College Station, Texas . It is the flagship institution of the Texas A&M University System. The sixth-largest university in the United States, A&M's enrollment for Fall 2011 was over 50,000 for the first time in school...

57 University of Colorado at Boulder Libraries 3,928,431 Academic University of Colorado at Boulder
University of Colorado at Boulder
The University of Colorado Boulder is a public research university located in Boulder, Colorado...

58 University of Connecticut Libraries 3,919,423 Academic University of Connecticut
University of Connecticut
The admission rate to the University of Connecticut is about 50% and has been steadily decreasing, with about 28,000 prospective students applying for admission to the freshman class in recent years. Approximately 40,000 prospective students tour the main campus in Storrs annually...

59 Brown University Library 3,825,413 Academic Brown University
Brown University
Brown University is a private, Ivy League university located in Providence, Rhode Island, United States. Founded in 1764 prior to American independence from the British Empire as the College in the English Colony of Rhode Island and Providence Plantations early in the reign of King George III ,...

60 Johns Hopkins University Libraries 3,740,029 Academic Johns Hopkins University
Johns Hopkins University
The Johns Hopkins University, commonly referred to as Johns Hopkins, JHU, or simply Hopkins, is a private research university based in Baltimore, Maryland, United States...

61 State University of New York at Buffalo Libraries 3,720,113 Academic University at Buffalo, The State University of New York
University at Buffalo, The State University of New York
University at Buffalo, The State University of New York, also commonly known as the University at Buffalo or UB, is a public research university and a "University Center" in the State University of New York system. The university was founded by Millard Fillmore in 1846. UB has multiple campuses...

62 University of Kentucky Libraries 3,719,548 Academic University of Kentucky
University of Kentucky
The University of Kentucky, also known as UK, is a public co-educational university and is one of the state's two land-grant universities, located in Lexington, Kentucky...

63 King County Library System
King County Library System
The King County Library System is a library system serving the residents of King County, Washington, United States. Headquartered in Issaquah, Washington, KCLS is currently the busiest library in the United States, circulating 22.4 million items in 2010. It consists of 48 libraries, a Traveling...

3,717,571 Public King County, Washington
King County, Washington
King County is a county located in the U.S. state of Washington. The population in the 2010 census was 1,931,249. King is the most populous county in Washington, and the 14th most populous in the United States....

64 University of Maryland Libraries
University of Maryland Libraries
The University of Maryland Libraries constitute the largest public research library in the state of Maryland. Seven libraries are located at University of Maryland, College Park campus, plus an additional library and media center located off-campus...

3,716,860 Academic University of Maryland, College Park
University of Maryland, College Park
The University of Maryland, College Park is a top-ranked public research university located in the city of College Park in Prince George's County, Maryland, just outside Washington, D.C...

65 University of Rochester Libraries 3,701,241 Academic University of Rochester
University of Rochester
The University of Rochester is a private, nonsectarian, research university in Rochester, New York, United States. The university grants undergraduate and graduate degrees, including doctoral and professional degrees. The university has six schools and various interdisciplinary programs.The...

66 University of California, Davis Library 3,683,867 Academic University of California, Davis
University of California, Davis
The University of California, Davis is a public teaching and research university established in 1905 and located in Davis, California, USA. Spanning over , the campus is the largest within the University of California system and third largest by enrollment...

67 Hawaii State Public Library System
Hawaii State Public Library System
The Hawaii State Public Library System is the only statewide public library system in the United States. The flagship Hawaii State Library, built in 1911 and designed by architect Henry D. Whitfield, was funded in part by industrialist and philanthropist Andrew Carnegie. It is a historic downtown...

3,664,347 Public State of Hawaii
Hawaii
Hawaii is the newest of the 50 U.S. states , and is the only U.S. state made up entirely of islands. It is the northernmost island group in Polynesia, occupying most of an archipelago in the central Pacific Ocean, southwest of the continental United States, southeast of Japan, and northeast of...

68 Wayne State University Libraries 3,660,642 Academic Wayne State University
Wayne State University
Wayne State University is a public research university located in Detroit, Michigan, United States, in the city's Midtown Cultural Center Historic District. Founded in 1868, WSU consists of 13 schools and colleges offering more than 400 major subject areas to over 32,000 graduate and...

69 San Diego Public Library
San Diego Public Library
The San Diego Public Library is a public library system serving the city of San Diego, California.-History:The San Diego Public Library was established on May 19, 1882, by an elected board of library trustees. The first location was rented space in the Commercial Bank building at Fifth and G...

3,645,389 Public City of San Diego
70 University of Cincinnati Libraries  3,631,658 Academic University of Cincinnati
University of Cincinnati
The University of Cincinnati is a comprehensive public research university in Cincinnati, Ohio, and a part of the University System of Ohio....

71 University of South Carolina Libraries 3,629,954 Academic University of South Carolina
University of South Carolina
The University of South Carolina is a public, co-educational research university located in Columbia, South Carolina, United States, with 7 surrounding satellite campuses. Its historic campus covers over in downtown Columbia not far from the South Carolina State House...

72 University of Massachusetts Amherst Libraries 3,578,753 Academic University of Massachusetts Amherst
University of Massachusetts Amherst
The University of Massachusetts Amherst is a public research and land-grant university in Amherst, Massachusetts, United States and the flagship of the University of Massachusetts system...

73 University of Hawaii at Manoa Library 3,533,671 Academic University of Hawaii at Mānoa
University of Hawaii at Manoa
The University of Hawaii at Mānoa is a public, co-educational university and is the flagship campus of the greater University of Hawaii system...

74 University of Missouri Libraries 3,494,470 Academic University of Missouri
University of Missouri
The University of Missouri System is a state university system providing centralized administration for four universities, a health care system, an extension program, five research and technology parks, and a publishing press. More than 64,000 students are currently enrolled at its four campuses...

75 Vanderbilt University
Vanderbilt University
Vanderbilt University is a private research university located in Nashville, Tennessee, United States. Founded in 1873, the university is named for shipping and rail magnate "Commodore" Cornelius Vanderbilt, who provided Vanderbilt its initial $1 million endowment despite having never been to the...

 Jean and Alexander Heard Library
3,440,317 Academic Vanderbilt University
Vanderbilt University
Vanderbilt University is a private research university located in Nashville, Tennessee, United States. Founded in 1873, the university is named for shipping and rail magnate "Commodore" Cornelius Vanderbilt, who provided Vanderbilt its initial $1 million endowment despite having never been to the...

76 Mid-Continent Public Library
Mid-Continent Public Library
Mid-Continent Public Library is a consolidated public library system serving Clay, Platte, and Jackson Counties in Missouri, with headquarters in Independence, Missouri...

3,415,944 Public Separate political division
Special-purpose district
Special-purpose districts or special district governments in the United States are independent governmental units that exist separately from, and with substantial administrative and fiscal independence from, general purpose local governments such as county, municipal, and township governments. As...

 governed by Board of Trustees
appointed by officials in Clay, Platte
Platte County, Missouri
As of the census of 2000, there were 73,781 people, 29,278 households, and 20,231 families residing in the county. The population density was 176 people per square mile . There were 30,902 housing units at an average density of 74 per square mile...

, and Jackson
Jackson County, Missouri
Jackson County is a county located in the U.S. state of Missouri. With a population of 674,158 in the 2010 census, Jackson County is the second most populous of Missouri's counties, after St. Louis County. Kansas City, the state's most populous city and focus city of the Kansas City Metropolitan...

 counties.
77 Broward County Libraries Division 3,414,251 Public Broward County, Florida
Broward County, Florida
-2000 Census:As of the census of 2000, there were 1,623,018 people, 654,445 households, and 411,645 families residing in the county. The population density was 1,346 people per square mile . There were 741,043 housing units at an average density of 615 per square mile...

78 University of Notre Dame
University of Notre Dame
The University of Notre Dame du Lac is a Catholic research university located in Notre Dame, an unincorporated community north of the city of South Bend, in St. Joseph County, Indiana, United States...

 Hesburgh Libraries
3,393,290 Academic University of Notre Dame
University of Notre Dame
The University of Notre Dame du Lac is a Catholic research university located in Notre Dame, an unincorporated community north of the city of South Bend, in St. Joseph County, Indiana, United States...

79 St. Louis Public Library
St. Louis Public Library
The St. Louis Public Library is a municipal public library system in the city of St. Louis, Missouri. It operates sixteen locations, including the main Central Library location. Although similarly named, the St. Louis Public Library is unrelated to the St...

3,381,858 Public City of St. Louis
St. Louis, Missouri
St. Louis is an independent city on the eastern border of Missouri, United States. With a population of 319,294, it was the 58th-largest U.S. city at the 2010 U.S. Census. The Greater St...

80 Emory University Libraries  3,377,140 Academic Emory University
Emory University
Emory University is a private research university in metropolitan Atlanta, located in the Druid Hills section of unincorporated DeKalb County, Georgia, United States. The university was founded as Emory College in 1836 in Oxford, Georgia by a small group of Methodists and was named in honor of...

81 University of Utah J. Willard Marriott Library
J. Willard Marriott Library
J. Willard Marriott Library is the library of the University of Utah in Salt Lake City, Utah. It was named for J. Willard Marriott, the founder of Marriott International. The library building is over and houses over 3 million volumes. The University of Utah Press is a division of the Marriott...

3,373,141 Academic University of Utah
University of Utah
The University of Utah, also known as the U or the U of U, is a public, coeducational research university in Salt Lake City, Utah, United States. The university was established in 1850 as the University of Deseret by the General Assembly of the provisional State of Deseret, making it Utah's oldest...

82 University of California, San Diego Libraries 3,372,785 Academic University of California, San Diego
University of California, San Diego
The University of California, San Diego, commonly known as UCSD or UC San Diego, is a public research university located in the La Jolla neighborhood of San Diego, California, United States...

83 Cuyahoga County Public Library
Cuyahoga County Public Library
Cuyahoga County Public Library has 28 branches that serve 47 communities in Cuyahoga County, Ohio. It was ranked the number one public library in the United States among libraries serving populations of more than 500,000 by the Hennen's American Public Library Ratings 2010...

3,337,662 Public Independent political subdivision in Cuyahoga County, Ohio
Cuyahoga County, Ohio
Cuyahoga County is a county located in the state of Ohio, United States. It is the most populous county in Ohio; as of the 2010 census, the population was 1,280,122. Its county seat is Cleveland. Cuyahoga County is part of Greater Cleveland, a metropolitan area, and Northeast Ohio, a...

84 Montgomery County
Montgomery County, Maryland
Montgomery County is a county in the U.S. state of Maryland, situated just to the north of Washington, D.C., and southwest of the city of Baltimore. It is one of the most affluent counties in the United States, and has the highest percentage of residents over 25 years of age who hold post-graduate...

 Department of Public Libraries
3,315,183 Public Montgomery County
Montgomery County, Maryland
Montgomery County is a county in the U.S. state of Maryland, situated just to the north of Washington, D.C., and southwest of the city of Baltimore. It is one of the most affluent counties in the United States, and has the highest percentage of residents over 25 years of age who hold post-graduate...

85 University of Tennessee Libraries 3,289,447 Academic University of Tennessee
University of Tennessee
The University of Tennessee is a public land-grant university headquartered at Knoxville, Tennessee, United States...

86 University of Miami Libraries 3,265,503 Academic University of Miami
University of Miami
The University of Miami is a private, non-sectarian university founded in 1925 with its main campus in Coral Gables, Florida, a medical campus in Miami city proper at Civic Center, and an oceanographic research facility on Virginia Key., the university currently enrolls 15,629 students in 12...

87 Howard-Tilton Memorial Library at Tulane University 3,257,609 Academic Tulane University
Tulane University
Tulane University is a private, nonsectarian research university located in New Orleans, Louisiana, United States...

88 Buffalo & Erie County Public Library
Buffalo & Erie County Public Library
The Buffalo & Erie County Public Library is located on Lafayette Square, Buffalo, New York. The current facility, built in 1963, replaced the original Cyrus Eidlitz Buffalo Public Library Building dedicated in February 1887. The first Buffalo Public Library, in turn, replaced the Erie County, New...

3,227,867 Public City of Buffalo
Buffalo, New York
Buffalo is the second most populous city in the state of New York, after New York City. Located in Western New York on the eastern shores of Lake Erie and at the head of the Niagara River across from Fort Erie, Ontario, Buffalo is the seat of Erie County and the principal city of the...

89 Temple University Libraries 3,205,539 Academic Temple University
Temple University
Temple University is a comprehensive public research university in Philadelphia, Pennsylvania, United States. Originally founded in 1884 by Dr. Russell Conwell, Temple University is among the nation's largest providers of professional education and prepares the largest body of professional...

90 University of Nebraska–Lincoln Libraries 3,204,060 Academic University of Nebraska–Lincoln
University of Nebraska–Lincoln
The University of Nebraska–Lincoln is a public research university located in the city of Lincoln in the U.S. state of Nebraska...

91 Allen County Public Library
Allen County Public Library
Allen County Public Library has been part of the social and cultural fabric of Fort Wayne, Indiana and surrounding communities in Allen County since 1895. Then known as the Fort Wayne Public Library, it served residents with 3,606 volumes out of a room in City Hall...

3,203,217 Public Allen County, Indiana
Allen County, Indiana
As of the census of 2000, there were 331,849 people, 128,745 households, and 86,259 families residing in the county. The population density was 505 people per square mile . There were 138,905 housing units at an average density of 211 per square mile...

92 Syracuse University Library 3,174,700 Academic Syracuse University
Syracuse University
Syracuse University is a private research university located in Syracuse, New York, United States. Its roots can be traced back to Genesee Wesleyan Seminary, founded by the Methodist Episcopal Church in 1832, which also later founded Genesee College...

93 Southern Illinois University Carbondale
Southern Illinois University Carbondale
Southern Illinois University Carbondale is a public research university located in Carbondale, Illinois, United States. Founded in 1869, SIUC is the flagship campus of the Southern Illinois University system...

 Morris Library
3,099,151 Academic Southern Illinois University Carbondale
Southern Illinois University Carbondale
Southern Illinois University Carbondale is a public research university located in Carbondale, Illinois, United States. Founded in 1869, SIUC is the flagship campus of the Southern Illinois University system...

94 Jacksonville Public Library
Jacksonville Public Library
The Jacksonville Public Library is the public library system of Jacksonville, Florida. It primarily serves Jacksonville and Duval County, and is also used by the neighboring Baker, Nassau, Clay, and St. Johns Counties. It is one of the largest library systems in the Florida, with a collection of...

3,071,780 Public City of Jacksonville
Jacksonville, Florida
Jacksonville is the largest city in the U.S. state of Florida in terms of both population and land area, and the largest city by area in the contiguous United States. It is the county seat of Duval County, with which the city government consolidated in 1968...

95 Auburn University Libraries 3,053,468 Academic Auburn University
Auburn University
Auburn University is a public university located in Auburn, Alabama, United States. With more than 25,000 students and 1,200 faculty members, it is one of the largest universities in the state. Auburn was chartered on February 7, 1856, as the East Alabama Male College, a private liberal arts...

96 University of California, Irvine Libraries 3,049,706 Academic University of California, Irvine
University of California, Irvine
The University of California, Irvine , founded in 1965, is one of the ten campuses of the University of California, located in Irvine, California, USA...

97 Georgetown University Library 3,041,624 Academic Georgetown University
Georgetown University
Georgetown University is a private, Jesuit, research university whose main campus is in the Georgetown neighborhood of Washington, D.C. Founded in 1789, it is the oldest Catholic university in the United States...

98 University of Oregon Libraries 2,959,739 Academic University of Oregon
University of Oregon
-Colleges and schools:The University of Oregon is organized into eight schools and colleges—six professional schools and colleges, an Arts and Sciences College and an Honors College.- School of Architecture and Allied Arts :...

99 University of California, Santa Barbara Library 2,948,999 Academic University of California, Santa Barbara
University of California, Santa Barbara
The University of California, Santa Barbara, commonly known as UCSB or UC Santa Barbara, is a public research university and one of the 10 general campuses of the University of California system. The main campus is located on a site in Goleta, California, from Santa Barbara and northwest of Los...

100 Massachusetts Institute of Technology Libraries 2,914,052 Academic Massachusetts Institute of Technology
Massachusetts Institute of Technology
The Massachusetts Institute of Technology is a private research university located in Cambridge, Massachusetts. MIT has five schools and one college, containing a total of 32 academic departments, with a strong emphasis on scientific and technological education and research.Founded in 1861 in...


External links

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