Oacoma town, South Dakota
Official LSAD Designation: Oacoma town • Census GEOID: 4646180
• Lyman County
Oacoma town is an incorporated town in Lyman County, South Dakota. According to official records from the Census (2025), Oacoma town had an estimated population of 391 residents. Official Census Bureau geographic records classify this community under LSAD designation Oacoma town (GEOID 4646180).
Local Government Administration U.S. Census Bureau GMAF
Town Of Oacoma
Municipal
Official Title:
Finance Officer
Address:
PO BOX 129, OACOMA SD 57365-0129
County Of Lyman
County
Official Title:
Auditor
Address:
PO BOX 38, KENNEBEC SD 57544-0038
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 391 | 2025 |
| Median Household Income | $73,333 | 2020-2024 |
| Median Home Value | $171,700 | 2020-2024 |
| Land Area | 2.63 sq mi | Gazetteer (2026) |
| Civic & Public Services | Hospitals, Libraries, Colleges | CMS / IMLS / IPEDS |
| Schools & Districts | NCES Directory Listings | Provided by k12guides.com |
| Nearby Airports | Landing Facilities | Provided by airport-data.com |
| Climate & Weather | NOAA 30-Year Normals | 1991–2020 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).