Geographic regions of the Commonwealth

Commonwealth (United States)

Four of the constituent states of the United States officially designate themselves Commonwealths: Kentucky, Massachusetts, Pennsylvania and Virginia....

 of Pennsylvania

Pennsylvania

The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...

, United States of America

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

.

Delaware Valley

The Delaware Valley is named for the Delaware River which flows through the region.

Consisting of the following counties:

• Bucks
  Bucks County, Pennsylvania
  - Industry and commerce :The boroughs of Bristol and Morrisville were prominent industrial centers along the Northeast Corridor during World War II. Suburban development accelerated in Lower Bucks in the 1950s with the opening of Levittown, Pennsylvania, the second such "Levittown" designed by...
  
  
• Philadelphia
  Philadelphia County, Pennsylvania
  -History:Tribes of Lenape were the first known occupants in the area which became Philadelphia County. The first European settlers were Swedes and Finns who arrived in 1638. The Netherlands seized the area in 1655, but permanently lost control to England in 1674...
  
  
• Delaware
  Delaware County, Pennsylvania
  Delaware County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 558,979, making it Pennsylvania's fifth most populous county, behind Philadelphia, Allegheny, Montgomery, and Bucks counties....
  
  
• Montgomery
  Montgomery County, Pennsylvania
  Montgomery County is a county located in the U.S. state of Pennsylvania, in the United States. As of 2010, the population was 799,874, making it the third most populous county in Pennsylvania . The county seat is Norristown.The county was created on September 10, 1784, out of land originally part...
  
  
• Chester
  Chester County, Pennsylvania
  -State parks:*French Creek State Park*Marsh Creek State Park*White Clay Creek Preserve-Demographics:As of the 2010 census, the county was 85.5% White, 6.1% Black or African American, 0.2% Native American or Alaskan Native, 3.9% Asian, 0.0% Native Hawaiian, 1.8% were two or more races, and 2.4% were...
  
  

This valley primarily contains the Philadelphia Metro Area.

Pennsylvania Piedmont

The Pennsylvania Piedmont region is a heavily agricultural section of the Piedmont Plateau located in Eastern Pennsylvania frequently cited as a candidate for extensive ecological preservation.

Consisting of the following counties:

• Franklin
  Franklin County, Pennsylvania
  As of the census of 2000, there were 129,313 people, 50,633 households, and 36,405 families residing in the county. The population density was 168 people per square mile . There were 53,803 housing units at an average density of 70 per square mile...
  
  
• Adams
  Adams County, Pennsylvania
  Adams County is a county in the U.S. state of Pennsylvania. As of the 2010 census, the population was 101,407. It was created on January 22, 1800, from part of York County and named in honor of the second President of the United States, John Adams...
  
  
• Cumberland
  Cumberland County, Pennsylvania
  Cumberland County is a county located in the U.S. state of Pennsylvania and is one of three counties comprising the Harrisburg–Carlisle Metropolitan Statistical Area. As of 2010, the population was 235,406.-History:...
  
  
• York
  York County, Pennsylvania
  York County is a county in the U.S. state of Pennsylvania. As of 2010, the population was 434,972. It is in the Susquehanna Valley, a large fertile agricultural region in South Central Pennsylvania....
  
  
• Dauphin
  Dauphin County, Pennsylvania
  Dauphin County is a county in the U.S. state of Pennsylvania and is one of the three counties comprising the Harrisburg–Carlisle Metropolitan Statistical Area. As of 2010 census, the population was 268,100. The county includes the city of Harrisburg, which has served as the state capital...
  
  
• Lancaster
  Lancaster County, Pennsylvania
  Lancaster County, known as the Garden Spot of America or Pennsylvania Dutch Country, is a county located in the southeastern part of the Commonwealth of Pennsylvania, in the United States. As of 2010 the population was 519,445. Lancaster County forms the Lancaster Metropolitan Statistical Area, the...
  
  
• Lebanon
  Lebanon County, Pennsylvania
  As of the census of 2000, there were 120,327 people and 32,771 families residing in the county. The population density was 332 people per square mile . There were 49,320 housing units at an average density of 136 per square mile...
  
  
• Chester
  Chester County, Pennsylvania
  -State parks:*French Creek State Park*Marsh Creek State Park*White Clay Creek Preserve-Demographics:As of the 2010 census, the county was 85.5% White, 6.1% Black or African American, 0.2% Native American or Alaskan Native, 3.9% Asian, 0.0% Native Hawaiian, 1.8% were two or more races, and 2.4% were...
  
  
• Berks
  Berks County, Pennsylvania
  -Demographics:As of the census of 2000, there were 373,638 people, 141,570 households, and 98,532 families residing in the county. The population density was 435 people per square mile . There were 150,222 housing units at an average density of 175 per square mile...
  
  
• Montgomery
  Montgomery County, Pennsylvania
  Montgomery County is a county located in the U.S. state of Pennsylvania, in the United States. As of 2010, the population was 799,874, making it the third most populous county in Pennsylvania . The county seat is Norristown.The county was created on September 10, 1784, out of land originally part...
  
  
• Bucks
  Bucks County, Pennsylvania
  - Industry and commerce :The boroughs of Bristol and Morrisville were prominent industrial centers along the Northeast Corridor during World War II. Suburban development accelerated in Lower Bucks in the 1950s with the opening of Levittown, Pennsylvania, the second such "Levittown" designed by...
  
  
• Lehigh
  Lehigh County, Pennsylvania
  -Climate:Most of the county's climate is considered to fall in the humid continental climate zone. Summers are typically hot and muggy, fall and spring are generally mild, and winter is cold. Precipitation is almost uniformly distributed throughout the year....
  
  
• Northampton
  Northampton County, Pennsylvania
  As of the 2010 census, the county was 86.3% White, 5.0% Black or African American, 0.2% Native American or Alaskan Native, 2.4% Asian, 0.0% Native Hawaiian, 2.2% were two or more races, and 3.8% were some other race. 10.5% of the population were of Hispanic or Latino ancestry.As of the census of...
  
  

Pennsylvania Dutch Country

Pennsylvania Dutch Country refers to an area of southeastern Pennsylvania that has a high percentage of Amish, Mennonite and "Fancy Dutch" inhabitants and where the Pennsylvania German language was historically common.

Consisting of the following counties:

• Lehigh
  Lehigh County, Pennsylvania
  -Climate:Most of the county's climate is considered to fall in the humid continental climate zone. Summers are typically hot and muggy, fall and spring are generally mild, and winter is cold. Precipitation is almost uniformly distributed throughout the year....
  
  
• Berks
  Berks County, Pennsylvania
  -Demographics:As of the census of 2000, there were 373,638 people, 141,570 households, and 98,532 families residing in the county. The population density was 435 people per square mile . There were 150,222 housing units at an average density of 175 per square mile...
  
  
• Lebanon
  Lebanon County, Pennsylvania
  As of the census of 2000, there were 120,327 people and 32,771 families residing in the county. The population density was 332 people per square mile . There were 49,320 housing units at an average density of 136 per square mile...
  
  
• Dauphin
  Dauphin County, Pennsylvania
  Dauphin County is a county in the U.S. state of Pennsylvania and is one of the three counties comprising the Harrisburg–Carlisle Metropolitan Statistical Area. As of 2010 census, the population was 268,100. The county includes the city of Harrisburg, which has served as the state capital...
  
  
• Lancaster
  Lancaster County, Pennsylvania
  Lancaster County, known as the Garden Spot of America or Pennsylvania Dutch Country, is a county located in the southeastern part of the Commonwealth of Pennsylvania, in the United States. As of 2010 the population was 519,445. Lancaster County forms the Lancaster Metropolitan Statistical Area, the...
  
  
• York
  York County, Pennsylvania
  York County is a county in the U.S. state of Pennsylvania. As of 2010, the population was 434,972. It is in the Susquehanna Valley, a large fertile agricultural region in South Central Pennsylvania....
  
  
• Perry
  Perry County, Pennsylvania
  As of the census of 2000, there were 43,602 people, 16,695 households, and 12,320 families residing in the county. The population density was 79 people per square mile . There were 18,941 housing units at an average density of 34 per square mile...
  
  
• Cumberland
  Cumberland County, Pennsylvania
  Cumberland County is a county located in the U.S. state of Pennsylvania and is one of three counties comprising the Harrisburg–Carlisle Metropolitan Statistical Area. As of 2010, the population was 235,406.-History:...
  
  
• Adams
  Adams County, Pennsylvania
  Adams County is a county in the U.S. state of Pennsylvania. As of the 2010 census, the population was 101,407. It was created on January 22, 1800, from part of York County and named in honor of the second President of the United States, John Adams...
  
  
• Franklin
  Franklin County, Pennsylvania
  As of the census of 2000, there were 129,313 people, 50,633 households, and 36,405 families residing in the county. The population density was 168 people per square mile . There were 53,803 housing units at an average density of 70 per square mile...
  
  

Lehigh Valley

Located along the Lehigh River

Lehigh River

The Lehigh River, a tributary of the Delaware River, is a river located in eastern Pennsylvania, in the United States. Part of the Lehigh, along with a number of its tributaries, is designated a Pennsylvania Scenic River by the state's Department of Conservation and Natural Resources...

.

Consisting of following counties:

• Lehigh
  Lehigh County, Pennsylvania
  -Climate:Most of the county's climate is considered to fall in the humid continental climate zone. Summers are typically hot and muggy, fall and spring are generally mild, and winter is cold. Precipitation is almost uniformly distributed throughout the year....
  
  
• Northampton
  Northampton County, Pennsylvania
  As of the 2010 census, the county was 86.3% White, 5.0% Black or African American, 0.2% Native American or Alaskan Native, 2.4% Asian, 0.0% Native Hawaiian, 2.2% were two or more races, and 3.8% were some other race. 10.5% of the population were of Hispanic or Latino ancestry.As of the census of...
  
  

This valley primarily contains the Allentown Metro Area.

Northeastern Pennsylvania

This mountainous area of Pennsylvania

Pennsylvania

The Commonwealth of Pennsylvania is a U.S. state that is located in the Northeastern and Mid-Atlantic regions of the United States. The state borders Delaware and Maryland to the south, West Virginia to the southwest, Ohio to the west, New York and Ontario, Canada, to the north, and New Jersey to...

 includes the Pocono Mountains, the Endless Mountains

Endless Mountains

The Endless Mountains are a chain of mountains in northeastern Pennsylvania. The Endless Mountains region includes Bradford, Sullivan, Susquehanna, Northern Wayne, and Wyoming Counties.-History and geography:...

 and former anthracite coal

Anthracite coal

Anthracite is a hard, compact variety of mineral coal that has a high luster...

 mining cities, boroughs, and villages.

Consisting of the following counties:

• Pike
  Pike County, Pennsylvania
  -National protected areas:* Delaware Water Gap National Recreation Area * Middle Delaware National Scenic River * Upper Delaware Scenic and Recreational River -Demographics:...
  
  
• Luzerne
  Luzerne County, Pennsylvania
  - Demographics :As of the 2010 census, the county was 90.7% White, 3.4% Black or African American, 0.2% Native American, 1.0% Asian, 3.3% were of some other race, and 1.5% were two or more races. 6.7% of the population was of Hispanic or Latino ancestry...
  
  
• Lackawanna
  Lackawanna County, Pennsylvania
  As of the census of 2000, there were 213,295 people, 86,218 households, and 55,783 families residing in the county. The population density was 465 people per square mile . There were 95,362 housing units at an average density of 208 per square mile...
  
  
• Monroe
  Monroe County, Pennsylvania
  -National protected areas:* Delaware Water Gap National Recreation Area * Middle Delaware National Scenic River -Demographics:As of the census of 2010, there are 176,567 people, 49,454 households, and 36,447 families residing in the county. The population density was 228 people per square mile...
  
  
• Montour
  Montour County, Pennsylvania
  Montour County is located in the U.S. state of Pennsylvania. In 2010, the county's population was 18,267. Its county seat is Danville. It is named for Andrew Montour, a prominent métis interpreter who served with George Washington during the French and Indian War. The county is part of the...
  
  
• Wyoming
  Wyoming County, Pennsylvania
  Wyoming County is a county located in the U.S. state of Pennsylvania. It was created in 1842 from part of Luzerne County. Its county seat is Tunkhannock.-Geography:According to the U.S...
  
  
• Bradford
  Bradford County, Pennsylvania
  -Demographics:As of the census of 2000, there were 62,761 people, 24,453 households, and 17,312 families residing in the county. The population density was 54 people per square mile . There were 28,664 housing units at an average density of 25 per square mile...
  
  
• Carbon
  Carbon County, Pennsylvania
  As of the census of 2000, there were 58,802 people, 23,701 households, and 16,424 families residing in the county. The population density was 154 people per square mile . There were 30,492 housing units at an average density of 80 per square mile...
  
  
• Columbia
  Columbia County, Pennsylvania
  As of the census of 2000, there were 64,151 people, 24,915 households, and 16,568 families residing in the county. The population density was 132 people per square mile . There were 27,733 housing units at an average density of 57 per square mile...
  
  
• Northumberland
  Northumberland County, Pennsylvania
  There were 38,835 households out of which 27.30% had children under the age of 18 living with them, 52.40% were married couples living together, 9.60% had a female householder with no husband present, and 34.10% were non-families. 30.20% of all households were made up of individuals and 15.50% had...
  
  
• Schuylkill
  Schuylkill County, Pennsylvania
  -Notable people:*Boxing heavyweight great Muhammad Ali had his training camp in Deer Lake.*Charles Justin Bailey, commanding general of the 81st Division in World War I, was born in Tamaqua on June 21, 1859....
  
  
• Sullivan
  Sullivan County, Pennsylvania
  Sullivan County is a county located in the U.S. state of Pennsylvania. As of 2010, the population is 6,428. Sullivan County was created on March 15, 1847, from part of Lycoming County and named for Charles Sullivan, leader of the Pennsylvania Senate...
  
  
• Susquehanna
  Susquehanna County, Pennsylvania
  -Demographics:As of the census of 2000, there were 42,238 people, 16,529 households, and 11,785 families residing in the county. The population density was 51 people per square mile . There were 21,829 housing units at an average density of 26 per square mile...
  
  

The Poconos

The Poconos, or the Pocono Mountains region, is a mountainous region of about 2,400 square miles (6,200 km²) located in northeastern Pennsylvania, approximately 30 miles north of Allentown, which are a popular recreational destination for local and regional visitors.

Consisting of the following counties:

• Carbon
  Carbon County, Pennsylvania
  As of the census of 2000, there were 58,802 people, 23,701 households, and 16,424 families residing in the county. The population density was 154 people per square mile . There were 30,492 housing units at an average density of 80 per square mile...
  
  
• Monroe
  Monroe County, Pennsylvania
  -National protected areas:* Delaware Water Gap National Recreation Area * Middle Delaware National Scenic River -Demographics:As of the census of 2010, there are 176,567 people, 49,454 households, and 36,447 families residing in the county. The population density was 228 people per square mile...
  
  
• Pike
  Pike County, Pennsylvania
  -National protected areas:* Delaware Water Gap National Recreation Area * Middle Delaware National Scenic River * Upper Delaware Scenic and Recreational River -Demographics:...
  
  
• Wayne
  Wayne County, Pennsylvania
  As of the census of 2000, there were 47,722 people, 18,350 households, and 12,936 families residing in the county. The population density was 65 people per square mile . There were 30,593 housing units at an average density of 42 per square mile...
  
  
• Luzerne
  Luzerne County, Pennsylvania
  - Demographics :As of the 2010 census, the county was 90.7% White, 3.4% Black or African American, 0.2% Native American, 1.0% Asian, 3.3% were of some other race, and 1.5% were two or more races. 6.7% of the population was of Hispanic or Latino ancestry...
  
  
• Susquehanna
  Susquehanna County, Pennsylvania
  -Demographics:As of the census of 2000, there were 42,238 people, 16,529 households, and 11,785 families residing in the county. The population density was 51 people per square mile . There were 21,829 housing units at an average density of 26 per square mile...
  
  

Coal Region

The Coal Region is a term used to refer to an area of Northeastern Pennsylvania in the central Appalachian Mountains. The region is home to the largest known deposits of anthracite coal found in the Americas, with an estimated reserve of seven billion short tons.

• Schuylkill
  Schuylkill County, Pennsylvania
  -Notable people:*Boxing heavyweight great Muhammad Ali had his training camp in Deer Lake.*Charles Justin Bailey, commanding general of the 81st Division in World War I, was born in Tamaqua on June 21, 1859....
  
  
• Carbon
  Carbon County, Pennsylvania
  As of the census of 2000, there were 58,802 people, 23,701 households, and 16,424 families residing in the county. The population density was 154 people per square mile . There were 30,492 housing units at an average density of 80 per square mile...
  
  
• Northumberland
  Northumberland County, Pennsylvania
  There were 38,835 households out of which 27.30% had children under the age of 18 living with them, 52.40% were married couples living together, 9.60% had a female householder with no husband present, and 34.10% were non-families. 30.20% of all households were made up of individuals and 15.50% had...
  
  
• Columbia
  Columbia County, Pennsylvania
  As of the census of 2000, there were 64,151 people, 24,915 households, and 16,568 families residing in the county. The population density was 132 people per square mile . There were 27,733 housing units at an average density of 57 per square mile...
  
  
• Luzerne
  Luzerne County, Pennsylvania
  - Demographics :As of the 2010 census, the county was 90.7% White, 3.4% Black or African American, 0.2% Native American, 1.0% Asian, 3.3% were of some other race, and 1.5% were two or more races. 6.7% of the population was of Hispanic or Latino ancestry...
  
  
• Lackawanna
  Lackawanna County, Pennsylvania
  As of the census of 2000, there were 213,295 people, 86,218 households, and 55,783 families residing in the county. The population density was 465 people per square mile . There were 95,362 housing units at an average density of 208 per square mile...
  
  

Wyoming Valley

Wyoming Valley is a region of northeastern Pennsylvania. The valley is a crescent-shaped depression, a part of the ridge-and-valley or folded Appalachians, which includes the metropolitan areas of Scranton, and Wilkes-Barre, Pennsylvania.

Consisting of the following counties:

• Luzerne
  Luzerne County, Pennsylvania
  - Demographics :As of the 2010 census, the county was 90.7% White, 3.4% Black or African American, 0.2% Native American, 1.0% Asian, 3.3% were of some other race, and 1.5% were two or more races. 6.7% of the population was of Hispanic or Latino ancestry...
  
  
• Lackawanna
  Lackawanna County, Pennsylvania
  As of the census of 2000, there were 213,295 people, 86,218 households, and 55,783 families residing in the county. The population density was 465 people per square mile . There were 95,362 housing units at an average density of 208 per square mile...
  
  

This valley primarily contains the Wilkes-Barre Metro Area and the Scranton Metro Area.

Endless Mountains

The Endless Mountains are a chain of mountains in northeastern Pennsylvania which are part of the Appalachian Mountains

Appalachian Mountains

The Appalachian Mountains #Whether the stressed vowel is or ,#Whether the "ch" is pronounced as a fricative or an affricate , and#Whether the final vowel is the monophthong or the diphthong .), often called the Appalachians, are a system of mountains in eastern North America. The Appalachians...

 chain. The "mountains" are not true mountains, geologically speaking, but are a dissected plateau and are part of the Allegheny Plateau

Allegheny Plateau

The Allegheny Plateau is a large dissected plateau area in western and central New York, northern and western Pennsylvania, northern and western West Virginia, and eastern Ohio...

, along with the higher Catskill Mountains

Catskill Mountains

The Catskill Mountains, an area in New York State northwest of New York City and southwest of Albany, are a mature dissected plateau, an uplifted region that was subsequently eroded into sharp relief. They are an eastward continuation, and the highest representation, of the Allegheny Plateau...

 to the east of the Endless Mountains in New York

New York

New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...

.

Consisting of the following counties:

• Sullivan
  Sullivan County, Pennsylvania
  Sullivan County is a county located in the U.S. state of Pennsylvania. As of 2010, the population is 6,428. Sullivan County was created on March 15, 1847, from part of Lycoming County and named for Charles Sullivan, leader of the Pennsylvania Senate...
  
  
• Wyoming
  Wyoming County, Pennsylvania
  Wyoming County is a county located in the U.S. state of Pennsylvania. It was created in 1842 from part of Luzerne County. Its county seat is Tunkhannock.-Geography:According to the U.S...
  
  
• Bradford
  Bradford County, Pennsylvania
  -Demographics:As of the census of 2000, there were 62,761 people, 24,453 households, and 17,312 families residing in the county. The population density was 54 people per square mile . There were 28,664 housing units at an average density of 25 per square mile...
  
  
• Susquehanna
  Susquehanna County, Pennsylvania
  -Demographics:As of the census of 2000, there were 42,238 people, 16,529 households, and 11,785 families residing in the county. The population density was 51 people per square mile . There were 21,829 housing units at an average density of 26 per square mile...
  
  

Northern Tier

The Northern Tier is a geographic region in north-central Pennsylvania.

Consisting of the following counties:

• Sullivan
  Sullivan County, Pennsylvania
  Sullivan County is a county located in the U.S. state of Pennsylvania. As of 2010, the population is 6,428. Sullivan County was created on March 15, 1847, from part of Lycoming County and named for Charles Sullivan, leader of the Pennsylvania Senate...
  
  
• Wyoming
  Wyoming County, Pennsylvania
  Wyoming County is a county located in the U.S. state of Pennsylvania. It was created in 1842 from part of Luzerne County. Its county seat is Tunkhannock.-Geography:According to the U.S...
  
  
• Bradford
  Bradford County, Pennsylvania
  -Demographics:As of the census of 2000, there were 62,761 people, 24,453 households, and 17,312 families residing in the county. The population density was 54 people per square mile . There were 28,664 housing units at an average density of 25 per square mile...
  
  
• Susquehanna
  Susquehanna County, Pennsylvania
  -Demographics:As of the census of 2000, there were 42,238 people, 16,529 households, and 11,785 families residing in the county. The population density was 51 people per square mile . There were 21,829 housing units at an average density of 26 per square mile...
  
  
• Tioga
  Tioga County, Pennsylvania
  Tioga County is a county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 41,981. Tioga County was created on March 26, 1804, from part of Lycoming County and named for the Tioga River. Its county seat is Wellsboro....
  
  

Susquehanna River Valley

The Susquehanna River is a river in the northeastern United States. At approximately 410 mi (715 km) long, it is the longest river on the American East Coast.

South Central Pennsylvania

South Central Pennsylvania is a geographic region that lies between the Delaware Valley

Delaware Valley

The Delaware Valley is a term used to refer to the valley where the Delaware River flows, along with the surrounding communities. This includes the metropolitan area centered on the city of Philadelphia. Such educational institutions as Delaware Valley Regional High School in Alexandria Township...

 and Western Pennsylvania

Western Pennsylvania

Western Pennsylvania consists of the western third of the state of Pennsylvania in the United States. Pittsburgh is the largest city in the region, with a metropolitan area population of about 2.4 million people, and serves as its economic and cultural center. Erie, Altoona, and Johnstown are its...

, United States.
Consisting of the following counties:

• Adams
  Adams County, Pennsylvania
  Adams County is a county in the U.S. state of Pennsylvania. As of the 2010 census, the population was 101,407. It was created on January 22, 1800, from part of York County and named in honor of the second President of the United States, John Adams...
  
  
• Cumberland
  Cumberland County, Pennsylvania
  Cumberland County is a county located in the U.S. state of Pennsylvania and is one of three counties comprising the Harrisburg–Carlisle Metropolitan Statistical Area. As of 2010, the population was 235,406.-History:...
  
  
• Dauphin
  Dauphin County, Pennsylvania
  Dauphin County is a county in the U.S. state of Pennsylvania and is one of the three counties comprising the Harrisburg–Carlisle Metropolitan Statistical Area. As of 2010 census, the population was 268,100. The county includes the city of Harrisburg, which has served as the state capital...
  
  
• Franklin
  Franklin County, Pennsylvania
  As of the census of 2000, there were 129,313 people, 50,633 households, and 36,405 families residing in the county. The population density was 168 people per square mile . There were 53,803 housing units at an average density of 70 per square mile...
  
  
• Huntingdon
  Huntingdon County, Pennsylvania
  Huntingdon County is a county located in the U.S. state of Pennsylvania. In 2010, its population was 45,913.Huntingdon County was created on September 20, 1787, from part of Bedford County. Its county seat is Huntingdon.-Geography:According to the U.S...
  
  
• Juniata
  Juniata County, Pennsylvania
  Juniata County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 24,636. Juniata County was created on March 2, 1831, from part of Mifflin County and named for the Juniata River. Its county seat is Mifflintown....
  
  
• Lancaster
  Lancaster County, Pennsylvania
  Lancaster County, known as the Garden Spot of America or Pennsylvania Dutch Country, is a county located in the southeastern part of the Commonwealth of Pennsylvania, in the United States. As of 2010 the population was 519,445. Lancaster County forms the Lancaster Metropolitan Statistical Area, the...
  
  
• Lebanon
  Lebanon County, Pennsylvania
  As of the census of 2000, there were 120,327 people and 32,771 families residing in the county. The population density was 332 people per square mile . There were 49,320 housing units at an average density of 136 per square mile...
  
  
• Mifflin
  Mifflin County, Pennsylvania
  Mifflin County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 46,682. Its county seat is Lewistown. It is named after Thomas Mifflin, the first Governor of Pennsylvania.-Geography:...
  
  
• Northumberland
  Northumberland County, Pennsylvania
  There were 38,835 households out of which 27.30% had children under the age of 18 living with them, 52.40% were married couples living together, 9.60% had a female householder with no husband present, and 34.10% were non-families. 30.20% of all households were made up of individuals and 15.50% had...
  
  
• Perry
  Perry County, Pennsylvania
  As of the census of 2000, there were 43,602 people, 16,695 households, and 12,320 families residing in the county. The population density was 79 people per square mile . There were 18,941 housing units at an average density of 34 per square mile...
  
  
• Schuylkill
  Schuylkill County, Pennsylvania
  -Notable people:*Boxing heavyweight great Muhammad Ali had his training camp in Deer Lake.*Charles Justin Bailey, commanding general of the 81st Division in World War I, was born in Tamaqua on June 21, 1859....
  
  
• Snyder
  Snyder County, Pennsylvania
  Snyder County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 39,702. Snyder County was formed in 1855 from parts of Union County...
  
  
• York
  York County, Pennsylvania
  York County is a county in the U.S. state of Pennsylvania. As of 2010, the population was 434,972. It is in the Susquehanna Valley, a large fertile agricultural region in South Central Pennsylvania....
  
  

Happy Valley

Happy Valley is a large valley located in central Pennsylvania. The 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...

 is located in the valley.
Consisting of the following county:

• Centre
  Centre County, Pennsylvania
  Centre County is a county located in the U.S. state of Pennsylvania. It is part of the State College, Pennsylvania Metropolitan Statistical Area. As of 2010, the population was 153,990....
  
  

Cumberland Valley

The Cumberland Valley is a geographic region that lies between South Mountain and the Blue Ridge Mountains of central Pennsylvania and western Maryland, United States.

Consisting of the following counties:

• Cumberland
  Cumberland County, Pennsylvania
  Cumberland County is a county located in the U.S. state of Pennsylvania and is one of three counties comprising the Harrisburg–Carlisle Metropolitan Statistical Area. As of 2010, the population was 235,406.-History:...
  
  
• Franklin
  Franklin County, Pennsylvania
  As of the census of 2000, there were 129,313 people, 50,633 households, and 36,405 families residing in the county. The population density was 168 people per square mile . There were 53,803 housing units at an average density of 70 per square mile...
  
  

Laurel Highlands

The Laurel Highlands, in the southwestern part of the state of Pennsylvania, traverses the Laurel and Chestnut ridges of the Allegheny Mountains

Allegheny Mountains

The Allegheny Mountain Range , also spelled Alleghany, Allegany and, informally, the Alleghenies, is part of the vast Appalachian Mountain Range of the eastern United States and Canada...

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Consisting of the following counties:

• Fayette
  Fayette County, Pennsylvania
  Fayette County is a county located in the U.S. state of Pennsylvania. As of the2010 census, the population was 136,606. The county is part of the Pittsburgh Metropolitan Statistical Area....
  
  
• Somerset
  Somerset County, Pennsylvania
  Somerset County is a county located in the state of Pennsylvania. As of 2010, the population was 77,742. Somerset County was created on April 17, 1795, from part of Bedford County and named for Somerset, United Kingdom. Its county seat is Somerset. It is part of the Johnstown, Pennsylvania,...
  
  
• Westmoreland
  Westmoreland County, Pennsylvania
  -Demographics:As of the census of 2000, there were 369,993 people, 149,813 households, and 104,569 families residing in the county. The population density was 361 people per square mile . There were 161,058 housing units at an average density of 157 per square mile...
  
  

Pittsburgh Metro Area

Consisting of the following counties:

• Allegheny
  Allegheny County, Pennsylvania
  Allegheny County is a county in the southwestern part of the U.S. state of Pennsylvania. As of the 2010 census, the population was 1,223,348; making it the second most populous county in Pennsylvania, following Philadelphia County. The county seat is Pittsburgh...
  
  
• Armstrong
  Armstrong County, Pennsylvania
  Armstrong County is a county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 68,941. It is located northeast of Pittsburgh and Allegheny County. Armstrong County was added to the Pittsburgh Metropolitan Statistical Area in 2003.The county seat is Kittanning...
  
  
• Beaver
  Beaver County, Pennsylvania
  -Demographics:As of the census of 2000, there were 181,412 people, 72,576 households, and 50,512 families residing in the county. The population density was 418 people per square mile . There were 77,765 housing units at an average density of 179 per square mile...
  
  
• Butler
  Butler County, Pennsylvania
  -Demographics:As of the census of 2000, there were 174,083 people, 65,862 households, and 46,827 families residing in the county. The population density was 221 people per square mile . There were 69,868 housing units at an average density of 89 per square mile...
  
  
• Washington
  Washington County, Pennsylvania
  -Government and politics:As of November 2008, there are 152,534 registered voters in Washington County .* Democratic: 89,027 * Republican: 49,025 * Other Parties: 14,482...
  
  
• Westmoreland
  Westmoreland County, Pennsylvania
  -Demographics:As of the census of 2000, there were 369,993 people, 149,813 households, and 104,569 families residing in the county. The population density was 361 people per square mile . There were 161,058 housing units at an average density of 157 per square mile...
  
  

Allegheny National Forest

The Allegheny National Forest is a National Forest located in northwestern Pennsylvania. The forest covers over 500,000 acres (2,000 km²) of land.

Consisting of the following counties:

• Forest
  Forest County, Pennsylvania
  Forest County is a county located in the U.S. state of Pennsylvania. As of 2010, the population is 7,716. Forest County is famous as a rural retreat. Nearly 75% of all dwellings in the county are second or vacation homes . Forest County does not have a single traffic light, the only county in the...
  
  
• Elk
  Elk County, Pennsylvania
  Elk County is a county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 31,946.Elk County was created on April 18, 1843, from parts of Jefferson, Clearfield and McKean Counties, and is named for the Eastern elk that historically inhabited the region. Its county...
  
  
• Warren
  Warren County, Pennsylvania
  Warren County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 41,815. It was formed in 1800 from parts of Allegheny and Lycoming counties; attached to Crawford County until 1805 and then to Venango County until Warren was formally organized in 1819. Its county...
  
  
• McKean
  McKean County, Pennsylvania
  As of the census of 2000, there were 45,936 people, 18,024 households, and 12,094 families residing in the county. The population density was 47 people per square mile . There were 21,644 housing units at an average density of 22 per square mile...
  
  

Pennsylvania's Northwest Region

• Erie
  Erie County, Pennsylvania
  Erie County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 280,566. Its county seat is the City of Erie.- Geography :...
  
  
• Crawford
  Crawford County, Pennsylvania
  Crawford County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 88,765.Crawford County was created on March 12, 1800, from part of Allegheny County and named for Colonel William Crawford...
  
  
• Mercer
  Mercer County, Pennsylvania
  Mercer County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 116,638. Its county seat is Mercer; Sharon is its largest city....
  
  
• Venango
  Venango County, Pennsylvania
  Venango County is a county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 54,984. Its county seat is Franklin.-History:Venango County was created on March 12, 1800 from parts of Allegheny and Lycoming Counties...
  
  
• Warren
  Warren County, Pennsylvania
  Warren County is a county located in the U.S. state of Pennsylvania. As of 2010, the population was 41,815. It was formed in 1800 from parts of Allegheny and Lycoming counties; attached to Crawford County until 1805 and then to Venango County until Warren was formally organized in 1819. Its county...
  
  
• Lawrence
  Lawrence County, Pennsylvania
  Lawrence County is a county located in the U.S. state of Pennsylvania. In 2010, its population was 91,108. The county was added to the Pittsburgh Metropolitan Statistical Area in 2003. The county seat is New Castle....
  
  
• Butler
  Butler County, Pennsylvania
  -Demographics:As of the census of 2000, there were 174,083 people, 65,862 households, and 46,827 families residing in the county. The population density was 221 people per square mile . There were 69,868 housing units at an average density of 89 per square mile...
  
  
• Clarion
  Clarion County, Pennsylvania
  As of the census of 2000, there were 41,765 people, 16,052 households, and 10,738 families residing in the county. The population density was 69 people per square mile . There were 19,426 housing units at an average density of 32 per square mile...
  
  
• Forest
  Forest County, Pennsylvania
  Forest County is a county located in the U.S. state of Pennsylvania. As of 2010, the population is 7,716. Forest County is famous as a rural retreat. Nearly 75% of all dwellings in the county are second or vacation homes . Forest County does not have a single traffic light, the only county in the...