South Dakota Pennington County
Keystone
A town in Pennington County, South Dakota — population 352 as of 2020.
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This Afternoon
72°F
Sunny
Tonight
47°F
Mostly Clear
Tuesday
70°F
Sunny
Tuesday Night
53°F
Slight Chance Showers And Thunderstorms15% precip
In and around Keystone
See & do
- Big Thunder Gold Mine
- Black Hill National Forest
- Black Hills Wilderness Edge
- Borglum Historical Center
- Keystone Community Center and Library
Eat, drink & stay
- American Pines Cabins
- BaRLee's food and drink
- Benky's Cream & Sugar
- Backroads Inn & Cabins
- Big Thunder Bar and Grill
Shops & services
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Keystone by the numbers
Population
352Population figure, 2020
Households & income
- Area
- 3 sq mi (7.77 km²)
- Median age
- 38.1
- Persons per household
- 3.1
- Median household income
- $64,702
Municipal office
- Office
- FINANCE OFFICER
- Address
- PO BOX 689, KEYSTONE, SD 57751