The Roman Catholic Archdiocese of Dubuque is an ecclesiastical territory or diocese of the Roman Catholic Church

Roman Catholic Church

The Catholic Church, also known as the Roman Catholic Church, is the world's largest Christian church, with over a billion members. Led by the Pope, it defines its mission as spreading the gospel of Jesus Christ, administering the sacraments and exercising charity...

 in the northeastern quarter of the state of Iowa

Iowa

Iowa is a state located in the Midwestern United States, an area often referred to as the "American Heartland". It derives its name from the Ioway people, one of the many American Indian tribes that occupied the state at the time of European exploration. Iowa was a part of the French colony of New...

 in the United States

United States

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

. It includes all the Iowa counties north of Polk

Polk County, Iowa

Polk County is a county located in the U.S. state of Iowa. The population was 430,640 in the 2010 census, an increase from 374,601 in the 2000 census. The county seat is Des Moines, which is also the capital city of Iowa...

, Jasper

Jasper County, Iowa

-2010 census:The 2010 census recorded a population of 36,842 in the county, with a population density of . There were 16,181 housing units, of which 14,806 were occupied.-2000 census:...

, Poweshiek

Poweshiek County, Iowa

-2010 census:The 2010 census recorded a population of 18,914 in the county, with a population density of . There were 8,949 housing units, of which 7,555 were occupied.-2000 census:...

, Iowa

Iowa County, Iowa

-2010 census:The 2010 census recorded a population of 16,355 in the county, with a population density of . There were 7,258 housing units, of which 6,677 were occupied.-2000 census:...

, Johnson

Johnson County, Iowa

-2010 census:The 2010 census recorded a population of 130,882 in the county, with a population density of . There were 55,967 housing units, of which 52,715 were occupied.-2000 census:...

, Cedar

Cedar County, Iowa

-2010 census:The 2010 census recorded a population of 13,956 in the county, with a population density of . There were 8,064 housing units, of which 7,511 were occupied.-2000 census:...

, and Clinton

Clinton County, Iowa

-2010 census:The 2010 census recorded a population of 49,116 in the county, with a population density of . There were 21,733 housing units, of which 20,223 were occupied.-2000 census:...

 counties. It also includes the counties east of Kossuth

Kossuth County, Iowa

-2010 census:The 2010 census recorded a population of 15,543 in the county, with a population density of . There were 7,486 housing units, of which 6,697 were occupied.-2000 census:...

, Humboldt

Humboldt County, Iowa

-2010 census:The 2010 census recorded a population of 9,815 in the county, with a population density of . There were 4,684 housing units, of which 4,209 were occupied.-2000 census:...

, Webster

Webster County, Iowa

-2010 census:The 2010 census recorded a population of 38,013 in the county, with a population density of . There were 17,035 housing units, of which 15,580 were occupied.-2000 census:...

 and Boone

Boone County, Iowa

-2010 census:The 2010 census recorded a population of 26,306 in the county, with a population density of . There were 11,756 housing units, of which 10,728 were occupied.-2000 census:...

 counties. The Archdiocese has an area of about 17400 square miles (45,065.8 km²).
The headquarters of the Archdiocese of Dubuque is in the city of Dubuque

Dubuque, Iowa

Dubuque is a city in and the county seat of Dubuque County, Iowa, United States, located along the Mississippi River. In 2010 its population was 57,637, making it the ninth-largest city in the state and the county's population was 93,653....

.