| ZIP Code | 57751 |
|---|---|
| City | Keystone |
| State | South Dakota (SD) |
| County | Pennington County |
| Area Code | 605 |
| Elevation | 4,642 ft |
| Latitude | 43.869135 |
|---|---|
| Longitude | -103.426932 |
| Timezone | Chicago (DST) |
| FIPS | 46103 |
| ZIP Type | Standard |
| Status | Active |
Race & Ethnicity
Age Breakdown
Key Indicators
| Median Age | 52.2 yrs |
|---|---|
| Avg Household Size | 2.67 |
| Below Poverty | 6.9% ▼ 31% below avg |
| College Grads | 54.7% ▲ 41% above avg |
| Unemployment | 3.1% ▼ 37% below avg |
| HS Graduate | 181 (26.4%) |
| Some College | 95 (13.8%) |
| Associates | 35 (5.1%) |
| Bachelors | 71 (10.3%) |
| Graduate Degree | 304 (44.3%) |
Education
Housing Tenure
Home Value Distribution
Financials
| Median HH Income | $100,714 ▲ 32% above avg ↑ 52% since 2019 |
|---|---|
| Median Home Value | $388,300 ▲ 39% above avg ↑ 57% since 2019 |
| Home/Income Ratio | 3.9x (nat avg ~3.5x) |
| Median Rent | $660/mo ↑ 14% since 2019 |
| Total Units | 450 |
| Vacant Units | 84 |
| Avg HH Size | 2.67 |
Income Distribution
How People Get to Work
Commute Time
Year Built
Summary
| Total Units | 450 |
|---|---|
| Vacant | 84 |
| Owner Occupied | 86.1% |
| Renter Occupied | 13.9% |
| Avg HH Size | 2.67 |
ZIP code 57751 is located in Keystone, South Dakota, within Pennington County. With a population of 996, this is a sparsely populated ZIP code with a mature community — the median age is 52.2 years. Economically, 57751 is a upper-middle-income ZIP code: the median household income of $100,714 is above the national average.
Real estate in ZIP code 57751 represents a mid-range housing market. The median home value of $388,300 is above the national average. Renters can expect to pay around $660 per month in median rent. Homeownership is strong here — 86.1% of occupied units are owner-occupied, suggesting an established, stable residential community. Median home values have increased by 57% since 2019.
The population of 57751 is primarily White (88.15%). Residents are well-educated — 54.7% hold a bachelor's degree or higher, which is above the national average. Poverty affects a relatively small share of residents at 6.9%. Household income has grown by 52% since 2019.
The unemployment rate in 57751 stands at 3.1%, which is below the national average. As in most parts of the country, driving alone is the dominant commute mode at 72%.
Overall, ZIP code 57751 in Keystone, SD is characterized as upper-middle-income, well-educated, a mature community, and predominantly owner-occupied. With 996 residents, a median household income of $100,714, and a median home value of $388,300, it offers a clear picture of life in this part of South Dakota.