Edwardsville
- County:
- Madison County
- County Seat:
- Yes
- Area (mi²):
- 19.981
- State:
- Illinois
Edwardsville is a city located in Madison County, Illinois. Edwardsville has a 2026 population of 26,715. It is also the county seat of Madison County. Edwardsville is currently declining at a rate of -0.18% annually and its population has decreased by -0.37% since the most recent census, which recorded a population of 26,813 in 2020.