Keystone, SD
Population 404 · South Dakota
About Keystone, SD
Keystone is a small community located in South Dakota with a population of 404 residents according to the latest US Census Bureau American Community Survey data. The median household income is $62,159 per year, which is 17% below the national median of $75,149. The median age of 37 years is close to the US median age of 38.9 years.
Housing Market Overview
The housing market in Keystone features a median home value of $188,800, which is 23% below the national median of $244,900. This positions Keystone in a moderately priced market relative to the rest of the country. Median monthly rent is $690, 41% below the national average of $1,163/month. Of the 204 total housing units, 67% are owner-occupied (93 units) and 33% are renter-occupied (45 units). The high homeownership rate suggests a stable, established residential community.
Economy & Employment
The local economy in Keystone shows an unemployment rate of 7.7%, which is significantly above the national rate of 3.7%, suggesting economic challenges in the area. The poverty rate stands at 11.1%, below the national average of 12.4%, reflecting generally favorable economic conditions. Workers in Keystone have an average one-way commute time of 29 minutes.
Education & Demographics
17.4% of Keystone residents aged 25 and older hold a bachelor's degree or higher, compared to the national average of 33.7%. The lower educational attainment rate may reflect the area's industry mix, with more employment in trades, manufacturing, or agricultural sectors. The community's demographic composition includes 15.8% White, 2.7% Hispanic or Latino, 0.0% Black or African American, and 0.5% Asian residents, with 6.4% of the population being foreign-born.
Cost of Living in Keystone, SD
Compared to national averages, Keystone has a median household income of $62,159 (17% below the national median of $75,149). Home values average $188,800, which is 23% below the national median. Monthly rent at $690 is 41% below the US average of $1,163. Within South Dakota, Keystone's income is 4% below the state average of $64,650, and home values are 31% above the state median of $143,757.
Why Live in Keystone, SD?
Keystone offers affordable housing with a median home value of $188,800, below the US average of $244,900, and rent that’s lower than the national average at $690/month, and a low poverty rate of 11.1%, better than the national average.
Potential considerations include median household income ($62,159) that falls below the national average. However, Keystone’s smaller community size offers a quieter lifestyle and tight-knit neighborhoods.
Keystone has a population of 404 with a median age of 37 years. Compare Keystone with other cities to see how it stacks up, or explore all cities in South Dakota.
Similar Cities Near Keystone
Cities in South Dakota with a similar population size.
| City | Population | Median Income | Home Value | |
|---|---|---|---|---|
| Hudson | 405 | $70,000 | $113,500 | Compare |
| Anderson | 406 | $143,705 | $372,300 | Compare |
| Langford | 402 | $74,063 | $105,800 | Compare |
| Two Strike | 398 | $0 | $0 | Compare |
| Colome | 397 | $44,167 | $67,500 | Compare |
| Hurley | 397 | $76,429 | $110,800 | Compare |
| Mountain Plains | 412 | $166,641 | $606,100 | Compare |
| Lake Poinsett | 413 | $101,136 | $446,600 | Compare |
Demographics
Racial & Ethnic Composition
Economy & Education
Housing
Other Cities in South Dakota
Data source: US Census Bureau ACS 5-Year Estimates. Last updated: 2026-04-05.
Compare Keystone With Other Cities
Frequently Asked Questions about Keystone
What is the population of Keystone, SD?
The population of Keystone, SD is 404 according to the latest US Census Bureau American Community Survey estimates. This makes it a small community in South Dakota.
What is the median household income in Keystone?
The median household income in Keystone, SD is $62,159 per year, which is 17% below the national median of $75,149.
What is the median home value in Keystone?
The median home value in Keystone, SD is $188,800, which is 23% below the national median of $244,900. The majority of housing units are owner-occupied.
What is the average rent in Keystone?
The median monthly rent in Keystone, SD is $690, which is 41% below the national average of $1,163/month.
What is the unemployment rate in Keystone?
The unemployment rate in Keystone, SD is 7.7%, compared to the national average of 3.7%. Job seekers may want to research the dominant industries in the area.
Is Keystone, SD a good place to live?
Keystone offers a moderate cost of living, affordable housing, and growing employment opportunities. With a population of 404 and a median age of 37, the city appeals to a broad range of residents.
How educated is Keystone, SD?
17.4% of residents in Keystone aged 25 and older hold a bachelor's degree or higher, compared to the national average of 33.7%. The educational profile reflects the area's industry mix and employment landscape.
What is the cost of living in Keystone?
Key cost-of-living indicators for Keystone, SD: median home value is $188,800 (23% below national), median rent is $690/month, and median household income is $62,159. The home-value-to-income ratio is 3.0x, indicating relatively affordable housing relative to local incomes.
What is the poverty rate in Keystone?
The poverty rate in Keystone, SD is 11.1%, compared to the national average of 12.4%. This below-average poverty rate reflects generally favorable economic conditions in the community.
How diverse is Keystone, SD?
Keystone's population is 15.8% White, 2.7% Hispanic or Latino, 0.0% Black or African American, 0.5% Asian, and 0.0% two or more races. 6.4% of residents are foreign-born.