Jersey County , Illinois

Jersey County: County in Illinois, United States


Jersey County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 22,985 and a population density of 24 people per km². After 10 years in 2020 county had an estimated population of 21,616 inhabitants. Its county seat is Jerseyville. The county was created 183 years ago in 1839.

Jersey County Quick Facts

Population : 21,616 (2020)
Country : United States of America
State : Illinois (United States)
Area : 976 km2
Water as percent of area : 2.1%
Land as percent of area : 97.9%
Named for : New Jersey
Altitude : 584 feet / 178 meters
Capital : Jerseyville
Establishment : February 02, 1839
Time Zone : America/Chicago
Local time : 12:12:49 (18th May 2022)
Density : 22 Pop. per km² as of 2020
Population growth : -6.33% (2010-2020)
Jersey County locator map
Location of Jersey County on Illinois map.
Jerseycourt image
Jerseycourt image


Jersey County is located at 39°5'8"N 90°21'24"W (39.0856600, -90.3566800). It has 4 neighbors: Calhoun County, Greene County, Macoupin County and Saint Charles County.

Jersey County map

The largest city of Jersey County is Jerseyville with a population of 8,111. Other cities include, Rosedale population 425, Fieldon population 219 and Fidelity population 113. See all Jersey County cities & populated places.

Jersey County Populated Places

Cities, Towns, Neighborhoods & Other Populated Places in Jersey County.

City Name Population Title
Jerseyville 8,111 City in Jersey County, Illinois, United States
Grafton 691 Town in Illinois, United States
Elsah 604 Township in Jersey County, Illinois
Rosedale 425 Unincorporated community in Illinois, United States
Fieldon 219 Human settlement in Illinois, United States of America
Otterville 116 Town of the United States
Fidelity 113 Human settlement in Illinois, United States of America
Camden 76 Village in Illinois, United States

Jersey County has 4 neighbours.


According to census records, the population of Jersey County decreased by 6.33% in 10 years.

Year Population % Change Method
2010 22,985 - census
2011 22,879 -0.46% estimation process
2012 22,710 -0.74% estimation process
2013 22,599 -0.49% estimation process
2014 22,492 -0.48% estimation process
2015 22,260 -1.04% estimation process
2016 21,947 -1.43% estimation process
2017 21,912 -0.16% estimation process
2018 21,795 -0.54% estimation process
2019 21,773 -0.1% estimation process
2020 21,616 -0.73% estimation process

Comitatul Jersey, Comte de Jersey, Comté de Jersey, Condado de Jersey, Condado han Jersey, Contea di Jersey, Dzhersi, Dzhursi, Hrabstwo Jersey, Jersey, Jersey Comitatus, Jersey Kun, Jersey Kūn, Jersey konderria, Jersey megye, Jersi srjan, Okrug DZerzi, Quan Jersey, Quận Jersey, jaji jun, jarsi ka'unti, mqatʿt jyrzy, ze xi xian, Джерси, Джерсі, Джърси, Округ Џерзи, Ջերսի շրջան, جرسی کاؤنٹی, جرسی کاؤنٹی، الینوائے, مقاطعة جيرزي, জার্সি কাউন্টি, ジャージー郡, 澤西縣

People born in Jersey County (1)

American temperance worker Jennie Florella Holmes was born in Jersey County

Illinois Other Counties (more counties)

County Name Population Title
Cook County 5,108,284 County in Illinois, United States
Chicago 2,677,643 City and county seat of Cook County, Illinois, United States
DuPage County 917,481 County in Illinois, United States
Lake County 693,593 County in Oregon, United States
Will County 688,726 County in Illinois, United States
Kane County 531,010 County in southern Utah, United States
Markham 328,966 City in Cook County, Illinois, United States
McHenry County 305,888 County in Illinois, United States
Winnebago County 281,295 County in Illinois, United States
Madison County 262,635 County in Montana, United States
Saint Clair County 258,046 The County of St.
Champaign County 209,192 County in Illinois, United States
Aurora 196,383 City in Kane County, Illinois, United States
Sangamon County 193,882 County in Illinois, United States
Peoria County 177,652 County in Illinois, United States of America
McLean County 171,256 County in North Dakota, United States