Hamilton County Flag

Hamilton County

State:
Ohio
County Seat:
Cincinnati

Hamilton County's estimated 2026 population is 848,959 with a growth rate of 0.69% 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 5.82% since that time.

848,959
Total Population
2,096
Population Density (mi²)
3
Population Rank (State)
5.8K 0.69%
Annual Population Growth

Hamilton County Population

Demographics

Economics and Income Statistics