Twin Brooks, South Dakota Demographics & Population 2026
During the 2020–2024 ACS period, Twin Brooks, South Dakota had a total population of 29, the 399th largest town in South Dakota. The poverty rate is 27.6%.
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 (27.6%), well above the national average of 12.4%.
- Only 4.5% of adults have a bachelor's degree, well below the national average of 35.7%.
- Unemployment rate of 25.0% is notably above the national average.
Twin Brooks Quick Facts
How Twin Brooks 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 | 35 | 29 | -17.1% |
| Median home value | $75,000 | $75,800 | +1.1% |
How Twin Brooks 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+)
Twin Brooks Rankings in South Dakota
Explore South Dakota Rankings
Other Cities in Grant County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Milbank | 3,525 | $56,011 | 13.2% | $155,000 |
| Big Stone City | 706 | $63,333 | 24.9% | $151,200 |
| Revillo | 88 | $56,300 | 11.4% | N/A |
| La Bolt | 80 | $71,667 | 7.5% | $65,000 |
| Stockholm | 74 | N/A | 16.2% | $97,000 |
| Strandburg | 58 | $68,125 | 31.0% | $104,200 |
| Marvin | 19 | $43,125 | 15.8% | N/A |
| Albee | 4 | N/A | 25.0% | N/A |
Cities Similar to Twin Brooks
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Rustic Acres Colony | 30 | N/A | N/A | 100.0% | 0.0% |
| Upland Colony | 30 | N/A | N/A | 0.0% | 0.0% |
| Lane | 28 | $98,333 | N/A | 8.7% | 0.0% |
| Andover | 31 | $68,333 | $57,500 | 23.1% | 9.7% |
| Farmer | 31 | N/A | N/A | 16.7% | 0.0% |
A note before these figures: with a population of 29, Twin Brooks'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
Twin Brooks is a small community located in South Dakota, within Grant County. The total population is 29. It ranks as the 399th most populous out of 439 Census-designated places in South Dakota.
Age Demographics
The median age in Twin Brooks is 55.8 years. This is 47% higher than the state median of 38.0 years. Only 6.9% of residents are under 18, indicating fewer families with children.
Economy, Income & Housing
The poverty rate stands at 27.6%. This is 131% 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 unemployment rate is 25.0%. This is 753% higher than the state rate of 2.9%. The median home value is $75,800. Housing costs are 71% lower than the state median of $257,400. 88.2% of occupied housing units are owner-occupied. This homeownership rate is 29% higher than the state average of 68.6%.
Race & Ethnicity
The largest racial or ethnic group in Twin Brooks is White (non-Hispanic), making up 79.3% of the population.
Education
4.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 86% 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 72.7%.
Data Sources & Methodology
All demographic data for Twin Brooks, 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 Twin Brooks, South Dakota?
Twin Brooks, South Dakota has a population of 29 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Twin Brooks, SD?
The Census Bureau does not publish a reliable median household income estimate for Twin Brooks — the community is too small for the ACS sample. The national median is $80,734.
What is the poverty rate in Twin Brooks, SD?
The poverty rate in Twin Brooks is 27.6%. This means approximately 8 residents live below the federal poverty line.
What is the racial makeup of Twin Brooks, South Dakota?
Twin Brooks's population is 79.3% White, 0.0% Black, 0.0% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Twin Brooks, SD?
The median home value in Twin Brooks is $75,800.
How educated is Twin Brooks, South Dakota?
4.5% of adults (25+) in Twin Brooks hold a bachelor's degree or higher, and 0.0% hold a graduate or professional degree.