Mound City, South Dakota Demographics & Population 2026
During the 2020–2024 ACS period, Mound City, South Dakota had a total population of 90, the 312th largest town in South Dakota. The poverty rate is 37.8%.
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 (37.8%), well above the national average of 12.4%.
- 61.0% of adults hold a bachelor's degree or higher — top 10% in South Dakota.
Mound City Quick Facts
How Mound City 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 | 97 | 90 | -7.2% |
| Median home value | $27,900 | $33,600 | +20.4% |
How Mound City 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+)
Mound City Rankings in South Dakota
Explore South Dakota Rankings
Other Cities in Campbell County
Cities Similar to Mound City
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Millerdale Colony | 90 | N/A | N/A | 0.0% | 0.0% |
| Morningside | 90 | $119,028 | $230,600 | 50.9% | 0.0% |
| Bath | 91 | $33,750 | N/A | 0.0% | 48.4% |
| Hitchcock | 91 | $67,656 | $81,000 | 18.7% | 14.3% |
| Lesterville | 91 | $56,250 | $70,800 | 12.3% | 7.7% |
A note before these figures: with a population of 90, Mound City'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
Mound City is a small community located in South Dakota, within Campbell County. The total population is 90. It ranks as the 312th most populous out of 439 Census-designated places in South Dakota.
Age Demographics
The median age in Mound City is 30.1 years. This is 21% lower than the state median of 38.0 years. Only 7.8% of residents are under 18, indicating fewer families with children.
Economy, Income & Housing
The poverty rate stands at 37.8%. This is 217% 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 Mound City, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $33,600. Housing costs are 87% lower than the state median of $257,400. 62.9% of occupied housing units are owner-occupied. This homeownership rate is 8% lower than the state average of 68.6%.
Race & Ethnicity
The largest racial or ethnic group in Mound City is Hispanic or Latino, making up 64.4% of the population. White (non-Hispanic) residents account for 32.2%. The White (non-Hispanic) population (32.2%) is well below the state average of 79.8%. The Hispanic or Latino population is significantly higher than the state average (64.4% vs 4.8%).
Education
61.0% of residents aged 25 and older hold a bachelor's degree or higher. This places Mound City in the top 10% of all cities in the state for educational attainment. This is 91% higher 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 91.5%.
Data Sources & Methodology
All demographic data for Mound City, 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 Mound City, South Dakota?
Mound City, South Dakota has a population of 90 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Mound City, SD?
The Census Bureau does not publish a reliable median household income estimate for Mound City — the community is too small for the ACS sample. The national median is $80,734.
What is the poverty rate in Mound City, SD?
The poverty rate in Mound City is 37.8%. This means approximately 34 residents live below the federal poverty line.
What is the racial makeup of Mound City, South Dakota?
Mound City's population is 32.2% White, 0.0% Black, 64.4% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Mound City, SD?
The median home value in Mound City is $33,600.
How educated is Mound City, South Dakota?
61.0% of adults (25+) in Mound City hold a bachelor's degree or higher, and 0.0% hold a graduate or professional degree.