Allen County Flag

Allen County

State:
Indiana
County Seat:
Fort Wayne

Allen County's estimated 2026 population is 407,623 with a growth rate of 1.03% in the past year according to the most recent United States census data. Allen County is the 3rd largest county in Indiana. The 2010 population was 355,956 and has seen a growth of 14.51% since that time.

407,623
Total Population
620
Population Density (mi²)
3
Population Rank (State)
4.2K 1.03%
Annual Population Growth

Allen County Population

Demographics

Economics and Income Statistics