COUNTY · OH
Franklin County, Ohio
Franklin County is a county in Ohio with FIPS code 39049 and an estimated population of 1,326,063 (Census 2023), 1st largest of 88 in the state.
County facts
- Name
- Franklin County
- State
- Ohio
- Type
- county
- FIPS code
- 39049
- State FIPS
- 39
- Population (2023)
- 1,326,063
- Change since 2020
- +0.1%
- State rank
- 1 of 88
Population is the Census Bureau’s Vintage 2023 estimate.
Major cities in Franklin County
Other counties in Ohio
Questions
What is the FIPS code for Franklin County?
Franklin County, Ohio has the five-digit FIPS code 39049: 39 for the state and 049 for the county.
What state is Franklin County in?
Franklin 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.