Missoula County, Montana

Missoula County
Missoula County Courthouse
Location within the U.S. state of Montana
Montana's location within the U.S.
Coordinates: 47°02′N 113°56′W / 47.04°N 113.93°W / 47.04; -113.93
Country United States
State Montana
FoundedDecember 14, 1860
SeatMissoula
Largest cityMissoula
Area
  Total
2,618 sq mi (6,780 km2)
  Land2,593 sq mi (6,720 km2)
  Water25 sq mi (60 km2)  1.0%
Population
 (2020)
  Total
117,922
  Estimate 
(2024)
122,546
  Density45/sq mi (17/km2)
Time zoneUTC−7 (Mountain)
  Summer (DST)UTC−6 (MDT)
Congressional district1st
Websitewww.missoulacounty.us
  • Montana county number 04

Missoula County /mɪˈzlə/ is a county located in the state of Montana. As of the 2020 census, the population was 117,922, making it Montana's third most populous county. Its county seat and most populous city is Missoula. The county was founded in 1860. Missoula County comprises the Missoula, MT Metropolitan Statistical Area, and is not a consolidated city-county.