Eureka city, South Dakota
Official LSAD Designation: Eureka city • Census GEOID: 4620180
• McPherson County
Eureka city is an incorporated city in McPherson County, South Dakota. According to official records from the Census (2025), Eureka city had an estimated population of 775 residents. Official Census Bureau geographic records classify this community under LSAD designation Eureka city (GEOID 4620180).
Local Government Administration U.S. Census Bureau GMAF
City Of Eureka
Municipal
Official Title:
Finance Officer
Address:
PO BOX 655, EUREKA SD 57437-0655
County Of Mcpherson
County
Official Title:
Auditor
Address:
PO BOX 390, LEOLA SD 57456-0390
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 775 | 2025 |
| Median Household Income | $47,583 | 2020-2024 |
| Median Home Value | $78,200 | 2020-2024 |
| Land Area | 0.93 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).