Jerseyville
- County:
- Jersey County
- County Seat:
- Yes
- Area (mi²):
- 5.237
- State:
- Illinois
Jerseyville is a city located in Jersey County, Illinois. Jerseyville has a 2026 population of 8,350. It is also the county seat of Jersey County. Jerseyville is currently growing at a rate of 0.72% annually and its population has increased by 0.32% since the most recent census, which recorded a population of 8,323 in 2020.