Stillwater County, Montana

Stillwater County
Beartooth Mountains from Park City
Location within the U.S. state of Montana
Montana's location within the U.S.
Coordinates: 45°40′N 109°23′W / 45.67°N 109.39°W / 45.67; -109.39
Country United States
State Montana
Founded1913
Named afterStillwater River
SeatColumbus
Largest townColumbus
Area
  Total
1,805 sq mi (4,670 km2)
  Land1,795 sq mi (4,650 km2)
  Water9.2 sq mi (24 km2)  0.5%
Population
 (2020)
  Total
8,963
  Estimate 
(2024)
9,450
  Density5.0/sq mi (1.9/km2)
Time zoneUTC−7 (Mountain)
  Summer (DST)UTC−6 (MDT)
Congressional district2nd
Websitewww.stillwater.mt.gov
  • Montana county number 32

Stillwater County is a county in the U.S. state of Montana. As of the 2020 census, the population was 8,963. Its county seat is Columbus.