Altamont, South Dakota Demographics & Population 2026
During the 2020–2024 ACS period, Altamont, South Dakota had a total population of 46, the 378th largest town in South Dakota. The poverty rate is 0.0%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Only 7.4% of adults have a bachelor's degree, well below the national average of 35.7%.
- Unemployment rate of 13.0% is notably above the national average.
Altamont Quick Facts
How Altamont 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 | 34 | 46 | +35.3% |
| Median home value | $263,900 | $252,800 | -4.2% |
How Altamont 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+)
Altamont Rankings in South Dakota
Explore South Dakota Rankings
Other Cities in Deuel County
Cities Similar to Altamont
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Millbrook Colony | 47 | N/A | N/A | 0.0% | 57.5% |
| Ravinia | 45 | $19,688 | $77,500 | 0.0% | 46.7% |
| Quinn | 48 | $79,000 | N/A | 8.1% | 0.0% |
| Vienna | 49 | $43,125 | N/A | 5.6% | 0.0% |
| Vivian | 50 | $61,528 | N/A | 6.0% | 0.0% |
A note before these figures: with a population of 46, Altamont'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
Altamont is a small community located in South Dakota, within Deuel County. The total population is 46. It ranks as the 378th most populous out of 439 Census-designated places in South Dakota.
Age Demographics
The median age in Altamont is 37.3 years. This is 2% lower than the state median of 38.0 years. With 37.0% of the population under 18, Altamont has a notably young demographic profile, suggesting a family-oriented community. 19.6% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.
Economy, Income & Housing
The ACS records no residents below the poverty line in Altamont. In a community this small the estimate rests on very few survey responses, so it should be read as an absence of measurement rather than a measured absence of poverty. The unemployment rate is 13.0%. This is 345% higher than the state rate of 2.9%. The median home value is $252,800. Housing costs are 2% lower than the state median of $257,400. 100.0% of occupied housing units are owner-occupied. This homeownership rate is 46% higher than the state average of 68.6%.
Race & Ethnicity
The largest racial or ethnic group in Altamont is White (non-Hispanic), making up 80.4% of the population. Hispanic or Latino residents account for 10.9%. The Hispanic or Latino population is significantly higher than the state average (10.9% vs 4.8%).
Education
7.4% of residents aged 25 and older hold a bachelor's degree or higher. This is 77% 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 85.2%.
Data Sources & Methodology
All demographic data for Altamont, 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 Altamont, South Dakota?
Altamont, South Dakota has a population of 46 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Altamont, SD?
The Census Bureau does not publish a reliable median household income estimate for Altamont — the community is too small for the ACS sample. The national median is $80,734.
What is the poverty rate in Altamont, SD?
The ACS sample for Altamont recorded no residents below the federal poverty line. Because the community is small, this indicates that the survey did not capture poverty here rather than that no poverty exists — the estimate carries a wide margin of error.
What is the racial makeup of Altamont, South Dakota?
Altamont's population is 80.4% White, 0.0% Black, 10.9% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Altamont, SD?
The median home value in Altamont is $252,800.
How educated is Altamont, South Dakota?
7.4% of adults (25+) in Altamont hold a bachelor's degree or higher, and 3.7% hold a graduate or professional degree.