
Saline County
- State:
- Illinois
- County Seat:
- Harrisburg
Saline County's estimated 2025 population is 22,515 with a growth rate of -0.79% in the past year according to the most recent United States census data. Saline County is the 52nd largest county in Illinois. The 2010 population was 24,900 and has seen a growth of -9.58% since that time.