Jefferson city, South Dakota
Official LSAD Designation: Jefferson city • Census GEOID: 4632700
• Union County
Jefferson city is an incorporated city in Union County, South Dakota. According to official records from the Census (2025), Jefferson city had an estimated population of 448 residents. Official Census Bureau geographic records classify this community under LSAD designation Jefferson city (GEOID 4632700).
Local Government Administration U.S. Census Bureau GMAF
City Of Jefferson
Municipal
Official Title:
Mayor
Address:
PO BOX 276, JEFFERSON SD 57038-0276
County Of Union
County
Official Title:
Chairman Of Board
Address:
209 E MAIN ST, STE 200, ELK POINT SD 57025-2327
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 448 | 2025 |
| Median Household Income | $82,888 | 2020-2024 |
| Median Home Value | $179,400 | 2020-2024 |
| Land Area | 0.51 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).