Oldham, South Dakota Demographics & Population 2026
During the 2020–2024 ACS period, Oldham, South Dakota had a total population of 75, the 339th largest city in South Dakota, with a median household income of $33,750, which is 55% lower than the state average. The poverty rate is 17.3%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 55% below the state average, indicating significant economic challenges.
Oldham Quick Facts
How Oldham 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 | 98 | 75 | -23.5% |
| Median household income | $29,643 | $33,750 | +13.9% |
How Oldham 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+)
Oldham Rankings in South Dakota
Explore South Dakota Rankings
Other Cities in Kingsbury County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| De Smet | 943 | $67,321 | 4.6% | $165,200 |
| Lake Preston | 596 | $52,396 | 17.0% | $130,000 |
| Badger | 162 | $65,000 | 3.7% | $70,000 |
| Erwin | 105 | $86,250 | 0.0% | N/A |
| Spring Lake Colony | 35 | N/A | 48.6% | N/A |
| Bancroft | 16 | N/A | 0.0% | N/A |
| Hetland | 10 | $46,250 | 0.0% | $57,500 |
Cities Similar to Oldham
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Old Elm Spring Colony | 75 | N/A | N/A | 100.0% | 48.8% |
| Stockholm | 74 | N/A | $97,000 | 12.5% | 16.2% |
| Cameron Colony | 77 | N/A | N/A | 39.0% | 39.0% |
| Interior | 77 | N/A | $137,500 | 25.0% | 68.8% |
| Mayfield Colony | 77 | N/A | N/A | 100.0% | 69.6% |
A note before these figures: with a population of 75, Oldham'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
Oldham is a small community located in South Dakota, within Kingsbury County. The total population is 75. It ranks as the 339th most populous out of 439 Census-designated places in South Dakota.
Age Demographics
The median age in Oldham is 59.8 years. This is 57% higher than the state median of 38.0 years. 16.0% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.
Economy, Income & Housing
The median household income in Oldham is $33,750. This is 55% lower than the state median of $75,081. It is also 58% lower than the national median of $80,734. The poverty rate stands at 17.3%. This is 45% higher than the state poverty rate of 11.9%. The unemployment rate is 7.4%. This is 153% higher than the state rate of 2.9%. 91.7% of occupied housing units are owner-occupied. This homeownership rate is 34% higher than the state average of 68.6%.
Race & Ethnicity
Oldham has a predominantly White (non-Hispanic) population, comprising 90.7% of all residents. Hispanic or Latino residents account for 6.7%.
Education
27.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 15% 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 98.3%.
Data Sources & Methodology
All demographic data for Oldham, 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 Oldham, South Dakota?
Oldham, South Dakota has a population of 75 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Oldham, SD?
The median household income in Oldham is $33,750, which is 58% lower than the national median of $80,734.
What is the poverty rate in Oldham, SD?
The poverty rate in Oldham is 17.3%. This means approximately 13 residents live below the federal poverty line.
What is the racial makeup of Oldham, South Dakota?
Oldham's population is 90.7% White, 0.0% Black, 6.7% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Oldham, SD?
The Census Bureau does not publish a reliable median home value estimate for Oldham — there are too few owner-occupied homes in the ACS sample. The national median is $332,700.
How educated is Oldham, South Dakota?
27.1% of adults (25+) in Oldham hold a bachelor's degree or higher, and 5.1% hold a graduate or professional degree.