South Dakota Pennington County
Keystone
A town in Pennington County, South Dakota — population 352 as of 2020.
Heat Advisory — Heat Advisory issued August 1 at 2:16AM MDT until August 2 at 8:00PM MDT by NWS Rapid City SD
Overnight
61°F
Mostly Clear
Saturday
94°F
Sunny
Saturday Night
73°F
Mostly Clear
Sunday
102°F
Sunny2% precip
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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