Keystone town, South Dakota Demographics & Population 2026
As of 2026, Keystone town, South Dakota has a total population of 404, the 176th largest city in South Dakota, with a median household income of $62,159, which is 14% lower than the state average. The poverty rate is 11.1%.
Keystone town Quick Facts
How Keystone town Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 33 | National average: 60
Education
Educational Attainment (Adults 25+)
Keystone town Rankings in South Dakota
Explore South Dakota Rankings
Other Cities in Pennington County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Rapid City city | 76,836 | $65,712 | 13.3% | $270,000 |
| Box Elder city | 12,457 | $73,698 | 7.4% | $271,800 |
| Hill City city | 699 | $85,714 | 3.9% | $246,700 |
| New Underwood city | 538 | $54,167 | 23.5% | $188,700 |
| Hermosa town | 296 | $53,194 | 14.9% | $108,800 |
| Fairview town | 95 | $69,464 | 17.9% | $129,200 |
| Wasta town | 77 | $45,000 | 7.8% | $111,500 |
| Quinn town | 76 | $95,795 | 0.0% | $104,200 |
Cities Similar to Keystone town
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Two Strike CDP | 398 | N/A | N/A | 7.5% | 57.3% |
| Bison town | 419 | $62,273 | $72,300 | 20.0% | 4.8% |
| Hudson town | 405 | $70,000 | $113,500 | 15.7% | 15.3% |
| Iroquois city | 425 | $60,750 | $138,500 | 22.0% | 1.7% |
| Rosholt town | 430 | $62,375 | $115,800 | 22.8% | 13.3% |
Population Overview
Keystone town is a small community located in South Dakota, within Pennington County. The total population is 404. It ranks as the 176th most populous out of 439 cities and towns in South Dakota.
Age Demographics
The median age in Keystone town is 37.0 years. This is 2% lower than the state median of 37.7 years. With 29.2% of the population under 18, Keystone town has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The median household income in Keystone town is $62,159. This is 14% lower than the state median of $72,421. Compared to the national median of $78,538, household income here is 21% lower. The poverty rate stands at 11.1%. This is 7% lower than the state poverty rate of 12.0%. The unemployment rate is 7.7%. This is 156% higher than the state rate of 3.0%. The median home value is $188,800. Housing costs are 20% lower than the state median of $236,800. The home-value-to-income ratio is 3.0x. 67.4% of occupied housing units are owner-occupied. This homeownership rate is 2% lower than the state average of 68.6%.
Race & Ethnicity
The largest racial or ethnic group in Keystone town is White (non-Hispanic), making up 73.3% of the population. Hispanic or Latino residents account for 16.3%. The Hispanic or Latino population is significantly higher than the state average (16.3% vs 4.6%). The Asian population (0.5%) is well below the state average of 1.4%.
Education
17.4% of residents aged 25 and older hold a bachelor's degree or higher. This is 44% lower than the state rate of 31.1%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 87.6%.
Data Sources & Methodology
All demographic data for Keystone town, South Dakota is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against South Dakota state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 439 Census-designated places in South Dakota. For official data, visit data.census.gov.
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Frequently Asked Questions
What is the population of Keystone town, South Dakota?
Keystone town, South Dakota has a population of 404 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Keystone town, SD?
The median household income in Keystone town is $62,159, which is 21% lower the national median of $78,538.
What is the poverty rate in Keystone town, SD?
The poverty rate in Keystone town is 11.1%. This means approximately 45 residents live below the federal poverty line.
What is the racial makeup of Keystone town, South Dakota?
Keystone town's population is 73.3% White, 0.0% Black, 16.3% Hispanic/Latino, and 0.5% Asian.
What is the median home value in Keystone town, SD?
The median home value in Keystone town is $188,800. The home-value-to-income ratio is 3.0x.
How educated is Keystone town, South Dakota?
17.4% of adults (25+) in Keystone town hold a bachelor's degree or higher, and 4.6% hold a graduate or professional degree.