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Oacoma

A town of 386 people in South Dakota
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About Oacoma

Town in South Dakota, United States
386Population
4.2 sq miArea
1,385 ftElevation

Oacoma is a town in Lyman County, South Dakota, United States. The population was 386 at the 2020 census. Oacoma is located on the west bank of the Missouri River, across from Chamberlain, South Dakota.

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

Town numbers

ZIP code57365
Living in Oacoma

Work & commute in Oacoma

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Most working residents leave Oacoma for work: only 7% work in town. The top destinations are Presho (10%), Sioux Falls (9%) and Chamberlain (6%). Half commute less than 35 miles.

Presho
10%
Sioux Falls
9%
Chamberlain
6%
Pierre
5%
Census LEHD 2023 · ACSWork & commute in Oacoma →

Health in Oacoma

Compared with South Dakota

4better than SD·2worse

of 26 measures CDC estimates. The other 20 are too close to call.

BetterToo close to callWorse

What stands out

Care nearby

Sanford Chamberlain Medical CenterChamberlain · 2.5 mi · ER · rural critical access
Access Health - ChamberlainChamberlain · 1.4 mi · sliding-scale fees
Primary careShortage · county-wide
DentalShortage · county-wide
Mental healthShortage · county-wide
CDC PLACES 2025 · modeled estimates for adults · CDC's estimate for Oacoma · CMS · HRSAHealth in Oacoma →

Natural hazards in Oacoma

85
Very high

Expected storm and flood damage is higher than in 85% of U.S. communities.

🌊 Inland flooding🥶 Cold waves🧊 Hail
FEMA National Risk Index December 2025 · OpenFEMANatural hazards in Oacoma →

Climate in Oacoma

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Oacoma has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 89°, a January night drops to 9°, and about 43 inches of snow falls in a normal winter.

34° / 12°Winter
60° / 34°Spring
86° / 60°Summer
63° / 37°Fall
NOAA U.S. Climate Normals, 1991–2020Climate in Oacoma →

Libraries near Oacoma

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Nearest: Cozard Memorial LibraryChamberlain · 1.9 miles · 42 hrs a week
Famous people from OacomaWriters, athletes, leaders and more who were born in Oacoma.Meet them →

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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/18 · 2025-01-01