Agar, South Dakota Demographics & Population 2026
During the 2020–2024 ACS period, Agar, South Dakota had a total population of 81, the 323rd largest town in South Dakota. The poverty rate is 16.1%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Agar Quick Facts
How Agar 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 | 86 | 81 | -5.8% |
| Median home value | $107,500 | $114,200 | +6.2% |
How Agar 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+)
Agar Rankings in South Dakota
Explore South Dakota Rankings
Other Cities in Sully County
Cities Similar to Agar
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Brandt | 82 | $60,625 | $80,000 | 9.0% | 12.2% |
| Raymond | 82 | $75,000 | $42,800 | 7.4% | 11.0% |
| Kaylor | 80 | N/A | $75,300 | 51.8% | 6.3% |
| La Bolt | 80 | $71,667 | $65,000 | 27.1% | 7.5% |
| McIntosh | 80 | $97,500 | $45,800 | 25.4% | 7.5% |
A note before these figures: with a population of 81, Agar'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
Agar is a small community located in South Dakota, within Sully County. The total population is 81. It ranks as the 323rd most populous out of 439 Census-designated places in South Dakota.
Age Demographics
The median age in Agar is 54.1 years. This is 42% higher than the state median of 38.0 years. Only 11.1% of residents are under 18, indicating fewer families with children.
Economy, Income & Housing
The poverty rate stands at 16.1%. This is 35% higher than the state poverty rate of 11.9%. The survey records no unemployed residents in Agar, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $114,200. Housing costs are 56% lower than the state median of $257,400. 68.6% of occupied housing units are owner-occupied.
Race & Ethnicity
The largest racial or ethnic group in Agar is White (non-Hispanic), making up 74.1% of the population.
Education
28.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 10% lower than the state rate of 31.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. No surveyed resident aged 25 or older reported leaving school before earning a high school diploma, though a rate of exactly 100% reflects the limits of a small sample.
Data Sources & Methodology
All demographic data for Agar, 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 Agar, South Dakota?
Agar, South Dakota has a population of 81 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Agar, SD?
The Census Bureau does not publish a reliable median household income estimate for Agar — the community is too small for the ACS sample. The national median is $80,734.
What is the poverty rate in Agar, SD?
The poverty rate in Agar is 16.1%. This means approximately 13 residents live below the federal poverty line.
What is the racial makeup of Agar, South Dakota?
Agar's population is 74.1% White, 0.0% Black, 0.0% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Agar, SD?
The median home value in Agar is $114,200.
How educated is Agar, South Dakota?
28.6% of adults (25+) in Agar hold a bachelor's degree or higher, and 1.6% hold a graduate or professional degree.