Oldham is a city in Kingsbury County, South Dakota, home to about 75 people across 0.3 square miles. Its ZIP code is 57051.
Homes sold for a median of $131 per square foot in the three months ending August 2026.
Each card is that ZIP code’s whole market, including any part outside Oldham. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field (MSP)204 miles away |
|---|---|
| Closer regional airport | Watertown Regional Airport (ATY)46 miles away |
| Nearest city of 250,000+ | Minneapolis, MN203 miles away |
| Nearest city of 1 million+ | Chicago, IL511 miles away |
Straight-line distances from the center of Oldham; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Oldham had 121 residents in the 2020 census, down 41% since 2000.
It’s the 339th largest of 440 towns in South Dakota by population.
Kingsbury County grew from 9,866 residents in 1900 to 5,187 in 2020.
Kingsbury County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 83°F in summer, and winter lows average 5°F. About 26.5 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Arlington 1 W, SD weather station (9 miles away).
1,254 jobs at 188 businesses in Kingsbury County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
Nearest hospitals
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.