Allen County Flag

Allen County

State:
Ohio
County Seat:
Lima

Allen County's estimated 2026 population is 100,810 with a growth rate of -0.07% in the past year according to the most recent United States census data. Allen County is the 26th largest county in Ohio. The 2010 population was 106,342 and has seen a growth of -5.2% since that time.

100,810
Total Population
250
Population Density (mi²)
26
Population Rank (State)
-71 -0.07%
Annual Population Growth

Allen County Population

Demographics

Economics and Income Statistics