Fort Thompson, South Dakota

Fort Thompson, South Dakota
Location in Buffalo County and the state of South Dakota
Coordinates: 44°03′10″N 99°24′48″W / 44.05278°N 99.41333°W / 44.05278; -99.41333
CountryUnited States
StateSouth Dakota
CountyBuffalo
Incorporated1889
Area
 • Total
12.60 sq mi (32.63 km2)
 • Land10.38 sq mi (26.88 km2)
 • Water2.22 sq mi (5.75 km2)
Elevation
1,437 ft (438 m)
Population
 (2020)
 • Total
1,224
 • Density117.9/sq mi (45.54/km2)
Time zoneUTC−6 (Central (CST))
 • Summer (DST)UTC−5 (CDT)
ZIP code
57339
Area code605
FIPS code46-22340
GNIS feature ID2393006

Fort Thompson (Lakota/ Dakota: Čhúŋkičakse) is a census-designated place (CDP) in Buffalo County, South Dakota, United States. As of the 2020 census, Fort Thompson had a population of 1,224, making it the largest settlement on the Crow Creek Reservation.

Fort Thompson was named in honor of Clark W. Thompson, superintendent of Indian Affairs.