
Menard County
- State:
- Illinois
- County Seat:
- Petersburg
Menard County's estimated 2025 population is 11,718 with a growth rate of -1% in the past year according to the most recent United States census data. Menard County is the 83rd largest county in Illinois. The 2010 population was 12,696 and has seen a growth of -7.7% since that time.