Richland County, Montana

Richland County
Richland County Courthouse in Sidney
Location within the U.S. state of Montana
Montana's location within the U.S.
Coordinates: 47°47′N 104°34′W / 47.79°N 104.56°W / 47.79; -104.56
Country United States
State Montana
FoundedMay 27, 1914
SeatSidney
Largest citySidney
Area
  Total
2,103 sq mi (5,450 km2)
  Land2,084 sq mi (5,400 km2)
  Water19 sq mi (50 km2)  0.9%
Population
 (2020)
  Total
11,491
  Estimate 
(2024)
11,028
  Density5.5/sq mi (2.1/km2)
Time zoneUTC−7 (Mountain)
  Summer (DST)UTC−6 (MDT)
Congressional district2nd
Websitewww.richland.org
  • Montana county number 27

Richland County is a county in the U.S. state of Montana. As of the 2020 census, the population was 11,491. Its county seat is Sidney.

Richland County was created by the Montana Legislature in 1914 from part of Dawson County. An early proposed name for the county was Gate, but Richland was decided upon instead as a way to entice new settlers.