Stillwater County, Montana

county in Montana, United States

Stillwater County is a county found in the U.S. state of Montana. As of the 2020 United States Census, there were 8,963 people.[1] Its county seat is Columbus.[2]

Stillwater County
Stillwater County Courthouse in Columbus
Stillwater County Courthouse in Columbus
Map of Montana highlighting Stillwater County
Location within the U.S. state of Montana
Map of the United States highlighting 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
Named forStillwater River
Largest townColumbus
 • Total1,805 sq mi (4,670 km2)
 • Land1,795 sq mi (4,650 km2)
 • Water9.2 sq mi (24 km2)  0.5%
 • Total8,963
 • Density5.0/sq mi (1.9/km2)
Time zoneUTC−7 (Mountain)
 • Summer (DST)UTC−6 (MDT)
Congressional district2nd
  • Montana county number 32


  1. "QuickFacts: Stillwater County, Montana". United States Census Bureau. Retrieved January 5, 2024.
  2. "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.