Hamilton County Flag

Hamilton County

State:
Ohio
County Seat:
Cincinnati

Hamilton County's estimated 2025 population is 831,732 with a growth rate of 0.28% in the past year according to the most recent United States census data. Hamilton County is the 3rd largest county in Ohio. The 2010 population was 802,295 and has seen a growth of 3.67% since that time.

831,732
Total Population
2,054
Population Density (mi²)
3
Population Rank (State)
2.3K 0.28%
Annual Population Growth

Hamilton County Population

Demographics

Economics and Income Statistics