Interior, South Dakota Demographics & Population 2026
During the 2020–2024 ACS period, Interior, South Dakota had a total population of 77, the 332nd largest town in South Dakota. The poverty rate is 68.8%.
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 (68.8%), well above the national average of 12.4%.
Interior Quick Facts
How Interior 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 | 53 | 77 | +45.3% |
| Median home value | $114,300 | $137,500 | +20.3% |
How Interior 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
Moderate diversity with one or two groups making up the majority.
State average: 35 | National average: 61
Education
Educational Attainment (Adults 25+)
Interior Rankings in South Dakota
Explore South Dakota Rankings
Other Cities in Jackson County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Wanblee | 534 | N/A | 53.4% | N/A |
| Kadoka | 372 | $43,750 | 12.7% | N/A |
| Belvidere | 114 | $50,469 | 0.0% | $17,500 |
| Cottonwood | 66 | N/A | 1.5% | N/A |
Cities Similar to Interior
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Cameron Colony | 77 | N/A | N/A | 39.0% | 39.0% |
| Mayfield Colony | 77 | N/A | N/A | 100.0% | 69.6% |
| Bradley | 78 | $57,500 | $94,200 | 23.4% | 11.5% |
| Carthage | 78 | $46,875 | $81,300 | 15.9% | 9.0% |
| Garden City | 78 | $93,750 | N/A | 9.6% | 4.0% |
A note before these figures: with a population of 77, Interior'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
Interior is a small community located in South Dakota, within Jackson County. The total population is 77. It ranks as the 332nd most populous out of 439 Census-designated places in South Dakota.
Age Demographics
The median age in Interior is 46.1 years. This is 21% higher than the state median of 38.0 years. With 39.0% of the population under 18, Interior has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The poverty rate stands at 68.8%. This is 477% 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 Interior, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $137,500. Housing costs are 47% lower than the state median of $257,400. 81.5% of occupied housing units are owner-occupied. This homeownership rate is 19% higher than the state average of 68.6%.
Race & Ethnicity
Interior is a highly diverse community where no single racial or ethnic group constitutes a majority of the population.
Education
25.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 22% lower than the state rate of 31.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.5%.
Data Sources & Methodology
All demographic data for Interior, 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.
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Frequently Asked Questions
What is the population of Interior, South Dakota?
Interior, South Dakota has a population of 77 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Interior, SD?
The Census Bureau does not publish a reliable median household income estimate for Interior — the community is too small for the ACS sample. The national median is $80,734.
What is the poverty rate in Interior, SD?
The poverty rate in Interior is 68.8%. This means approximately 53 residents live below the federal poverty line.
What is the racial makeup of Interior, South Dakota?
Interior's population is 40.3% White, 0.0% Black, 0.0% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Interior, SD?
The median home value in Interior is $137,500.
How educated is Interior, South Dakota?
25.0% of adults (25+) in Interior hold a bachelor's degree or higher, and 11.4% hold a graduate or professional degree.