Back مقاطعة جيرزي (إلينوي) Arabic Jersey County, Illinois BAR Джърси (окръг, Илинойс) Bulgarian জার্সি কাউন্টি, ইলিনয়স BPY Jersey Gông (Illinois) CDO Jersey County CEB Jersey County, Illinois Welsh Jersey County German Condado de Jersey Spanish Jersey maakond Estonian
Jersey County | |
|---|---|
 Jersey County Courthouse in Jerseyville | |
 Location within the U.S. state of Illinois | |
 Illinois's location within the U.S. | |
| Coordinates: 39°05′N 90°22′W / 39.09°N 90.36°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 |
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.
Jersey County is included in the St. Louis, MO-IL Metropolitan Statistical Area.
- ^ "State & County QuickFacts". United States Census Bureau. Archived from the original on June 6, 2011. Retrieved July 6, 2014.
- ^ "Find a County". National Association of Counties. Archived from the original on May 9, 2015. Retrieved June 7, 2011.