ZIP code 57751: Keystone, SD
57751 is a ZIP code in Keystone, South Dakota, mainly in Pennington County, part of the Rapid City, SD metro area. About 893 people live here.
- Population
- 893
- Median household income
- $97,969
- Typical home value
- $534,800+3.3% in 12 months
- Median rent
- $600gross, per month
- Median age
- 54.2
- Homeowners
- 85.6%of occupied homes
Shaded: ZIP code 57751's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 57751 details
| City | Keystone |
|---|---|
| State | South Dakota |
| County | Pennington County (also partly Custer County) |
| Metro area | Rapid City, SD |
| Time zone | Mountain Time (UTC−7), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 44.2 sq mi, plus 0 sq mi of water |
| Population density | 20 people per sq mi |
| Bachelor's degree or higher | 43% of adults 25+ |
| Average commute | 34.2 minutes |
| Center coordinates | 43.86913, -103.42693 |
Median rent in 57751 by bedrooms
| Size | Median gross rent |
|---|---|
| 1 bedroom | $525/mo |
| 2 bedrooms | $970/mo |
| 3 bedrooms | $544/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 57751
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 57702 | Rapid City, SD | 11.3 mi | 35,595 |
| 57730 | Custer, SD | 14.8 mi | 5,596 |
| 57709 | Rapid City, SD | 15.3 mi | — |
| 57738 | Fairburn, SD | 18.5 mi | 356 |
| 57744 | Hermosa, SD | 20.3 mi | 2,421 |
| 57745 | Hill City, SD | 20.4 mi | 1,894 |
| 57773 | Pringle, SD | 20.7 mi | 206 |
| 57701 | Rapid City, SD | 20.8 mi | 45,795 |
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
Buying a home in 57751?
A typical home in ZIP code 57751 is worth about $534,800 (Zillow Home Value Index). The median household here earns $97,969 a year. See what buying here would cost per month, with South Dakota average taxes and insurance filled in.
Monthly payment for a $534,800 homeWhat can a $97,969 income afford?Rental property numbers
About ZIP code 57751
What city is ZIP code 57751?
ZIP code 57751 is in Keystone, SD, in Pennington County.
What county is ZIP code 57751 in?
57751 is mainly in Pennington County, South Dakota, and partly in Custer County.
What is the population of ZIP code 57751?
About 893 people live in ZIP code 57751, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 57751 in?
57751 is in Mountain Time (UTC−7). It observes daylight saving time.