United States › South Dakota › Keystone CITY
Keystone South Dakota · 268 residents (2025 est.) · 3.00 sq mi
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The short version
With 336 people, Keystone is a city in South Dakota. 13% of adults hold a bachelor's degree, below the 36% national rate. Renters pay $546 a month at the median. Home values have more than tripled since 2000, reaching $263,900. Poverty is uncommon here, at 6.8% of people here. Getting to work takes 33 minutes on average.
At a glance
Lower income
below the US median
US median: $82,259
Mid-age
median age 38.1
US median: 38.9
Less educated
13% hold a bachelor's degree
US average: 36%
Less affordable
home values up 280%, inflation adjusted
US median home: $376,019
Section 01
Population & growth from 311 in 2000
268 in 2025 (Census Bureau estimate)
from 121 / sq mi in 2009
US average: 281
from 41.1 in 2000
US average: 38.9
Population, 1990 – 2024
194 269 344 419 494 1990 2000 2010 2020 2024 Keystone Age distribution, 2024
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Section 02
Income & economy $64,702
+35%inflation adjusted, since 2000
from $26,406 in 2000
US average: $82,259
from $15,828 in 2000
US average: $44,673
Households earning $100K+
from 16.2% in 2009
US average: 53.3%
from 16.9% in 2000
US average: 12.5%
from 0.311 in 2010
US average: 0.476
Workforce by industry, 2024
Agriculture, forestry, fishing 12.4%
Professional, scientific, technical 10.7%
Transportation & warehousing 2.2%
Education & health services 1.1%
Arts, entertainment, food 0.6%
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$263,900
+280%inflation adjusted, since 2000
from $38,100 in 2000
US average: $376,019
$546
−39%inflation adjusted, since 2000
from $492 in 2000
US average: $1,442
from 66.4% in 2000
29.9% rent
from 38.6% in 2009
US average: 10.0%
3.12 people
+33%since 2009
from 2.35 people in 2009
US average: 2.54
from 38.9% in 2009
US average: 22.9%
from 42.2% in 2009
US average: 47.4%
from 3.7 in 2009
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity 2000
White, non-Hispanic 93.2%(290)
Hispanic / Latino 3.5%(11)
2024
White, non-Hispanic 63.7%(214)
Hispanic / Latino 23.8%(80)
from 30 in 2009
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 4 more ancestry groups with data from 14.5% in 2000
US average: 35.6%
High school or higher
from 83.2% in 2000
US average: 89.6%
from 2.8% in 2000
US average: 14.0%
Section 06
Commute & transportation from 15.9 min in 2000
US average: 26.5
from 87.7% in 2009
US average: 68.9%
from 2.7% in 2009
US average: 8.5%
from 0.0% in 2009
US average: 3.2%
from 7.5% in 2009
US average: 15.0%
from 2.1% in 2009
US average: 2.4%
from 0.0% in 2009
US average: 0.4%
from 3.9% in 2009
US average: 8.3%
Section 07
Work & employment from 0.0% in 2011
US average: 5.2%
from 67.7% in 2011
US average: 63.5%
Women 20-64 in the labor force
from 87.5% in 2020
US average: 74.6%
from 4.4% in 2009
US average: 13.1%
from 30.9% in 2009
US average: 42.5%
Section 08
People & community from 5.8% in 2009
US average: 14.1%
from 20.5% in 2009
US average: 6.2%
from 13.5% in 2012
US average: 13.3%
from 25.6% in 2013
US average: 8.4%
from 65.5% in 2017
US average: 91.0%
Computer in household
from 90.7% in 2020
US average: 95.5%
from 75.0% in 2020
US average: 87.7%
from 94.2% in 2016
US average: 77.7%
from 3.2% in 2016
US average: 13.6%
Marital status
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 25.6% in 2013
US average: 8.4%
from 32.3% in 2020
US average: 54.8%
Direct-purchase
from 18.3% in 2020
US average: 13.8%
from 10.9% in 2020
US average: 18.4%
from 26.0% in 2020
US average: 20.9%
VA health care
from 3.7% in 2020
US average: 2.2%
Any private
from 50.7% in 2020
US average: 67.1%
Any public
from 38.2% in 2020
US average: 36.7%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans Veterans by period of service, 2024
Gulf War (2001 or later) 0%(0)
Share of the 24 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
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Compare Keystone to nearby cities Frequently asked
How many people live in Keystone, South Dakota? Keystone, South Dakota has about 336 residents according to the 2024 American Community Survey.
What is the median household income in Keystone, South Dakota? The typical household in Keystone, South Dakota earns about $64,702 a year. Half of households make more than that, and half make less.
Is Keystone, South Dakota expensive? In Keystone, South Dakota, the median home is worth about $263,900, and the typical rent is about $546 a month.
How educated are people in Keystone, South Dakota? About 13.5% of adults age 25 and over in Keystone, South Dakota hold a bachelor's degree or higher.
What is the poverty rate in Keystone, South Dakota? About 6.8% of people in Keystone, South Dakota live below the federal poverty line.
Has Keystone, South Dakota grown since 1990? Yes, Keystone, South Dakota has grown since 1990. The population has added about 117 residents, a change of about 53 percent over that period.
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