Allen, South Dakota Demographics & Population 2026
During the 2020–2024 ACS period, Allen, South Dakota had a total population of 783, the 102nd largest community in South Dakota. The poverty rate is 37.5%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- More than 1 in 4 residents live below the poverty line (37.5%), well above the national average of 12.4%.
- Only 0.0% of adults have a bachelor's degree, well below the national average of 35.7%.
Allen Quick Facts
How Allen Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 860 | 783 | -9.0% |
How Allen Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 35 | National average: 61
Education
Educational Attainment (Adults 25+)
Allen Rankings in South Dakota
Explore South Dakota Rankings
Other Cities in Bennett County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Martin | 947 | $54,063 | 17.5% | $103,900 |
Cities Similar to Allen
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Timber Lake | 779 | $60,694 | $81,400 | 22.9% | 15.8% |
| Eureka | 778 | $47,583 | $78,200 | 21.9% | 15.2% |
| Mina | 767 | $103,333 | $378,600 | 44.8% | 1.3% |
| Castlewood | 804 | $87,045 | $198,200 | 24.9% | 4.3% |
| Woonsocket | 759 | $56,765 | $80,800 | 13.2% | 7.0% |
A note before these figures: with a population of 783, Allen's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
Allen is a small community located in South Dakota, within Bennett County. The total population is 783. It ranks as the 102nd most populous out of 439 Census-designated places in South Dakota.
Age Demographics
The median age in Allen is 17.7 years. This is 53% lower than the state median of 38.0 years. With 51.0% of the population under 18, Allen has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The poverty rate stands at 37.5%. This is 215% higher than the state poverty rate of 11.9%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The survey records no unemployed residents in Allen, which reflects the size of the sample rather than a labor market without joblessness. 11.1% of occupied housing units are owner-occupied. This homeownership rate is 84% lower than the state average of 68.6%.
Race & Ethnicity
Allen is a highly diverse community where no single racial or ethnic group constitutes a majority of the population. The Hispanic or Latino population is significantly higher than the state average (8.7% vs 4.8%).
Education
0.0% of residents aged 25 and older hold a bachelor's degree or higher. This is among the lowest rates in the state, which may correlate with employment and income patterns. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 71.5%.
Data Sources & Methodology
All demographic data for Allen, South Dakota is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. 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. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
Free data download: Get all South Dakota city and county demographics as CSV. Download Cities CSV | Download Counties CSV
Frequently Asked Questions
What is the population of Allen, South Dakota?
Allen, South Dakota has a population of 783 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Allen, SD?
The Census Bureau does not publish a reliable median household income estimate for Allen — the community is too small for the ACS sample. The national median is $80,734.
What is the poverty rate in Allen, SD?
The poverty rate in Allen is 37.5%. This means approximately 294 residents live below the federal poverty line.
What is the racial makeup of Allen, South Dakota?
Allen's population is 0.0% White, 0.0% Black, 8.7% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Allen, SD?
The Census Bureau does not publish a reliable median home value estimate for Allen — there are too few owner-occupied homes in the ACS sample. The national median is $332,700.
How educated is Allen, South Dakota?
0.0% of adults (25+) in Allen hold a bachelor's degree or higher, and 0.0% hold a graduate or professional degree.