COUNTY · MT
Missoula County, Montana
Missoula County is a county in Montana with FIPS code 30063 and an estimated population of 121,849 (Census 2023), 3rd largest of 56 in the state.
County facts
- Name
- Missoula County
- State
- Montana
- Type
- county
- FIPS code
- 30063
- State FIPS
- 30
- Population (2023)
- 121,849
- Change since 2020
- +3.0%
- State rank
- 3 of 56
Population is the Census Bureau’s Vintage 2023 estimate.
Major cities in Missoula County
Other counties in Montana
Questions
What is the FIPS code for Missoula County?
Missoula County, Montana has the five-digit FIPS code 30063: 30 for the state and 063 for the county.
What state is Missoula County in?
Missoula County is in Montana.
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.