Keystone, South Dakota

Keystone, South Dakota
Town
Business district in Keystone (March 2012)
Business district in Keystone (March 2012)
Motto: 
"Home of Mount Rushmore"
Location in Pennington County and the state of South Dakota
Location in Pennington County and the state of South Dakota
Coordinates: 43°53′42″N 103°25′36″W / 43.89500°N 103.42667°W / 43.89500; -103.42667
CountryUnited States
StateSouth Dakota
CountyPennington
Area
[1]
 • Total
3.00 sq mi (7.77 km2)
 • Land3.00 sq mi (7.77 km2)
 • Water0.00 sq mi (0.00 km2)
Elevation
[2]
4,554 ft (1,388 m)
Population
 (2020)[3]
 • Total
240
 • Density80.00/sq mi (30.89/km2)
Time zoneUTC-7 (Mountain (MST))
 • Summer (DST)UTC-6 (MDT)
ZIP code
57751
Area code605
FIPS code46-33820[4]
GNIS feature ID1267444[2]
Rock Sculpture of Mount Rushmore

Keystone is a town in the Black Hills region of Pennington County, South Dakota, United States. The population was 240 at the 2020 census.[5] It had its origins in 1883 as a mining town, and has since transformed itself into a resort town, serving the needs of the millions of visitors to the Mount Rushmore National Memorial, which is located just beyond the town limits. Keystone was heavily damaged in the 1972 Black Hills flood.

The town took its name from a local mine, which most likely was named after the keystone Masonic symbol.[6]

  1. ^ "ArcGIS REST Services Directory". United States Census Bureau. Retrieved October 15, 2022.
  2. ^ a b U.S. Geological Survey Geographic Names Information System: Keystone, South Dakota
  3. ^ Cite error: The named reference USCensusDecennial2020CenPopScriptOnly was invoked but never defined (see the help page).
  4. ^ "U.S. Census website". United States Census Bureau. Retrieved January 31, 2008.
  5. ^ "U.S. Census Bureau: Keystone town, South Dakota". www.census.gov. United States Census Bureau. Retrieved March 19, 2022.
  6. ^ Federal Writers' Project (1940). South Dakota place-names, v.1-3. University of South Dakota. p. 45.