Keystone, SD
Population 404 · South Dakota
About Keystone, SD
Keystone is a small community in South Dakota with a population of 404 residents. The median household income is $62,159 per year, which is near the national average. The median age in Keystone is 37 years.
Housing in Keystone has a median home value of $188,800 and median monthly rent of $690. Of the 204 total housing units, the majority are owner-occupied, with 93 owner-occupied and 45 renter-occupied units.
The unemployment rate in Keystone is 7.7% and the poverty rate is 11.1%. 17.4% of residents hold a bachelor's degree or higher. The average commute time is 29 minutes.
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.
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Frequently Asked Questions about Keystone
What is the population of Keystone, SD?
The population of Keystone, SD is 404 according to the latest Census data.
What is the median household income in Keystone?
The median household income in Keystone, SD is $62,159 per year.
What is the median home value in Keystone?
The median home value in Keystone, SD is $188,800.
What is the average rent in Keystone?
The median monthly rent in Keystone, SD is $690.
What is the unemployment rate in Keystone?
The unemployment rate in Keystone, SD is 7.7%.