COUNTY · ID
Kootenai County, Idaho
Kootenai County is a county in Idaho with FIPS code 16055 and an estimated population of 185,010 (Census 2023), 3rd largest of 44 in the state.
County facts
- Name
- Kootenai County
- State
- Idaho
- Type
- county
- FIPS code
- 16055
- State FIPS
- 16
- Population (2023)
- 185,010
- Change since 2020
- +7.1%
- State rank
- 3 of 44
Population is the Census Bureau’s Vintage 2023 estimate.
Questions
What is the FIPS code for Kootenai County?
Kootenai County, Idaho has the five-digit FIPS code 16055: 16 for the state and 055 for the county.
What state is Kootenai County in?
Kootenai County is in Idaho.
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.