COUNTY · IN
Dearborn County, Indiana
Dearborn County is a county in Indiana with FIPS code 18029 and an estimated population of 51,215 (Census 2023), 28th largest of 92 in the state.
County facts
- Name
- Dearborn County
- State
- Indiana
- Type
- county
- FIPS code
- 18029
- State FIPS
- 18
- Population (2023)
- 51,215
- Change since 2020
- +0.9%
- State rank
- 28 of 92
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Dearborn County?
Dearborn County, Indiana has the five-digit FIPS code 18029: 18 for the state and 029 for the county.
What state is Dearborn County in?
Dearborn County is in Indiana.
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.