Effingham County Flag

Effingham County

State:
Illinois
County Seat:
Effingham

Effingham County's estimated 2026 population is 34,900 with a growth rate of 0.43% in the past year according to the most recent United States census data. Effingham County is the 40th largest county in Illinois. The 2010 population was 34,222 and has seen a growth of 1.98% since that time.

34,900
Total Population
73
Population Density (mi²)
40
Population Rank (State)
149 0.43%
Annual Population Growth

Effingham County Population

Demographics

Economics and Income Statistics