Sanders County, Montana

county in Montana, United States

Sanders County is a county in the U.S. state of Montana. As of the 2020 United States Census, the population was 12,400 people.[1] Its county seat is Thompson Falls.[2] It was created in 1905.[3]

Sanders County
Historic Sanders County Jail in Thompson Falls, Montana
Map of Montana highlighting Sanders County
Location within the U.S. state of Montana
Map of the United States highlighting 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
Named forWilbur Fiske Sanders
SeatThompson Falls
Largest cityThompson Falls
 • Total2,790 sq mi (7,200 km2)
 • Land2,761 sq mi (7,150 km2)
 • Water29 sq mi (80 km2)  1.1%
 • Total12,400
 • Density4.4/sq mi (1.7/km2)
Time zoneUTC−7 (Mountain)
 • Summer (DST)UTC−6 (MDT)
Congressional district1st
  • Montana county number 35


  1. "QuickFacts: Sanders County, Montana". United States Census Bureau. Retrieved January 5, 2024.
  2. "Find a County". National Association of Counties. Retrieved June 7, 2011.
  3. Montana Place Names from Alzada to Zortman. Helena MT: Montana Historical Society Press. 2009. p. 236. ISBN 9780975919613.