Keystone, SD ZIP code
The ZIP code for Keystone, South Dakota is 57751. It is in Pennington County.
- Population in these ZIPs
- 893
- Avg. median income
- $98,000population-weighted
- Typical home value
- $534,800population-weighted
- Metro area
- Rapid City, SD
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Keystone, SD ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 57751 | 893 | $97,969 | $534,800 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Keystone
- Custer 15 mi
- Rapid City 16 mi
- Fairburn 18 mi
- Hermosa 20 mi
- Hill City 20 mi
- Pringle 21 mi
- Black Hawk 21 mi
- Nemo 26 mi
- Ellsworth Afb 26 mi
- Piedmont 27 mi
- Caputa 32 mi
- Box Elder 33 mi
Frequently asked questions
What is the ZIP code for Keystone, SD?
The ZIP code for Keystone, SD is 57751.
What county is Keystone, South Dakota in?
Keystone ZIP codes are in Pennington County.