Sanders County, Montana

47°40′N 115°08′W / 47.66°N 115.13°W / 47.66; -115.13

Sanders County
Location within the U.S. state of Montana
Montana's location within the U.S.
Coordinates: 47°40′N 115°08′W / 47.66°N 115.13°W / 47.66; -115.13
Country United States
State Montana
Founded1905
Named afterWilbur Fiske Sanders
SeatThompson Falls
Largest cityThompson Falls
Area
  Total
2,790 sq mi (7,200 km2)
  Land2,761 sq mi (7,150 km2)
  Water29 sq mi (80 km2)  1.1%
Population
 (2020)
  Total
12,400
  Estimate 
(2024)
13,895
  Density4.4/sq mi (1.7/km2)
Time zoneUTC−7 (Mountain)
  Summer (DST)UTC−6 (MDT)
Congressional district1st
Websitewww.co.sanders.mt.us
  • Montana county number 35

Sanders County is a county in the U.S. state of Montana. As of the 2020 census, the population was 12,400. Its county seat is Thompson Falls. The county was founded in 1905.

It has an annual county fair with rodeo at Plains.