Peoria County Flag

Peoria County

State:
Illinois
County Seat:
Peoria

Peoria County's estimated 2025 population is 176,539 with a growth rate of -0.28% in the past year according to the most recent United States census data. Peoria County is the 12th largest county in Illinois. The 2010 population was 186,224 and has seen a growth of -5.2% since that time.

176,539
Total Population
285
Population Density (mi²)
12
Population Rank (State)
-487 -0.28%
Annual Population Growth

Peoria County Population

Demographics

Economics and Income Statistics