Hamilton County Flag

Hamilton County

State:
Illinois
County Seat:
McLeansboro

Hamilton County's estimated 2025 population is 7,771 with a growth rate of -0.89% in the past year according to the most recent United States census data. Hamilton County is the 89th largest county in Illinois. The 2010 population was 8,446 and has seen a growth of -7.99% since that time.

7,771
Total Population
18
Population Density (mi²)
89
Population Rank (State)
-70 -0.89%
Annual Population Growth

Hamilton County Population

Demographics

Economics and Income Statistics