COUNTY · IN
Porter County, Indiana
Porter County is a county in Indiana with FIPS code 18127 and an estimated population of 175,335 (Census 2023), 10th largest of 92 in the state.
County facts
- Name
- Porter County
- State
- Indiana
- Type
- county
- FIPS code
- 18127
- State FIPS
- 18
- Population (2023)
- 175,335
- Change since 2020
- +1.2%
- State rank
- 10 of 92
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Porter County?
Porter County, Indiana has the five-digit FIPS code 18127: 18 for the state and 127 for the county.
What state is Porter County in?
Porter 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.