Jersey County, Illinois
County in Illinois, United States / From Wikipedia, the free encyclopedia
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Jersey County is a county located in the U.S. state of Illinois. At the 2020 census, it had a population of 21,512.[1] The county seat and largest community is Jerseyville, with a population of 8,337 in 2010.[2] The county's smallest incorporated community is Otterville, with a population of 87.
Quick Facts Country, State ...
Jersey County | |
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Coordinates: 39°05′N 90°22′W | |
Country | United States |
State | Illinois |
Founded | February 28, 1839 |
Named for | New Jersey |
Seat | Jerseyville |
Largest city | Jerseyville |
Area | |
• Total | 377 sq mi (980 km2) |
• Land | 369 sq mi (960 km2) |
• Water | 7.9 sq mi (20 km2) 2.1% |
Population (2020) | |
• Total | 21,512 |
• Density | 57/sq mi (22/km2) |
Time zone | UTC−6 (Central) |
• Summer (DST) | UTC−5 (CDT) |
Congressional district | 15th |
Website | www |
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Jersey County is included in the St. Louis, MO-IL Metropolitan Statistical Area.