Eureka city, Illinois
Official LSAD Designation: Eureka city • Census GEOID: 1724543
• Woodford County
Eureka city is an incorporated city in Woodford County, Illinois. According to official records from the Census (2025), Eureka city had an estimated population of 5,129 residents. Official Census Bureau geographic records classify this community under LSAD designation Eureka city (GEOID 1724543).
Local Government Administration U.S. Census Bureau GMAF
City Of Eureka
Municipal
Official Title:
Deputy Clerk
Address:
128 N MAIN ST, STE 2, EUREKA IL 61530-1178
County Of Woodford
County
Official Title:
Woodford County Clerk
Address:
115 N MAIN ST, STE 103, EUREKA IL 61530
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 5,129 | 2025 |
| Median Household Income | $56,048 | 2020-2024 |
| Median Home Value | $154,300 | 2020-2024 |
| Land Area | 2.74 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).