Keystone, South Dakota
Keystone is a town in Pennington County, South Dakota, with an estimated population of 241 in 2023. It sits at 43.8949, -103.4268 .
| Field | Value |
|---|---|
| Place name | Keystone |
| Type | town |
| State | South Dakota (SD) |
| County | Pennington County |
| Population (2023 est.) | 241 |
| Land area | 3.00 sq mi (7.78 km²) |
| Coordinates | 43.8949, -103.4268 |
| Time zone | — |
| ZIP codes | 57751 |
ZIP codes and area codes for Keystone
Keystone covers 1 ZIP code: 57751. Browse all ZIP codes in South Dakota for the full list.
Where is Keystone?
Keystone is located in South Dakota, in Pennington County. The coordinates above can be pasted directly into any map service. The nearest indexed places are listed below, which is a useful check when two states share a place name.
Nearby places
Hill City 12 km · SDCuster 20 km · SDHermosa 20 km · SDRapid City 26 km · SDSummerset 34 km · SDPiedmont 36 km · SDBox Elder 37 km · SDNew Underwood 52 km · SD
Other places in Pennington County
Frequently asked questions
What county is Keystone, SD in?
Keystone is in Pennington County, South Dakota.
What is the population of Keystone, SD?
The 2023 Census Bureau estimate is 241.
What time zone is Keystone in?
Keystone is in the US local time zone.