COUNTY · OH
Hamilton County, Ohio
Hamilton County is a county in Ohio with FIPS code 39061 and an estimated population of 827,058 (Census 2023), 3rd largest of 88 in the state.
County facts
- Name
- Hamilton County
- State
- Ohio
- Type
- county
- FIPS code
- 39061
- State FIPS
- 39
- Population (2023)
- 827,058
- Change since 2020
- -0.4%
- State rank
- 3 of 88
Population is the Census Bureau’s Vintage 2023 estimate.
Major cities in Hamilton County
Other counties in Ohio
Questions
What is the FIPS code for Hamilton County?
Hamilton County, Ohio has the five-digit FIPS code 39061: 39 for the state and 061 for the county.
What state is Hamilton County in?
Hamilton County is in Ohio.
How do I know if an address is in this county?
Use the address lookup. ZIP codes and city names can cross county lines, so an address is the reliable check.
Sources: U.S. Census Bureau geographic reference files; Census Bureau Population Estimates, Vintage 2023. Last reviewed 2026-10-27.