COUNTY · OH
Butler County, Ohio
Butler County is a county in Ohio with FIPS code 39017 and an estimated population of 393,043 (Census 2023), 7th largest of 88 in the state.
County facts
- Name
- Butler County
- State
- Ohio
- Type
- county
- FIPS code
- 39017
- State FIPS
- 39
- Population (2023)
- 393,043
- Change since 2020
- +0.6%
- State rank
- 7 of 88
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Butler County?
Butler County, Ohio has the five-digit FIPS code 39017: 39 for the state and 017 for the county.
What state is Butler County in?
Butler 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.