Auburn city, Illinois
Official LSAD Designation: Auburn city • Census GEOID: 1702921
• Sangamon County
Auburn city is an incorporated city in Sangamon County, Illinois. According to official records from the Census (2025), Auburn city had an estimated population of 4,442 residents. Official Census Bureau geographic records classify this community under LSAD designation Auburn city (GEOID 1702921).
Local Government Administration U.S. Census Bureau GMAF
City Of Auburn
Municipal
Official Title:
Office Manager
Address:
324 W JEFFERSON ST, AUBURN IL 62615-1424
County Of Sangamon
County
Official Title:
Dep. Auditor
Address:
200 S 9TH ST, STE 201, SPRINGFIELD IL 62701-1967
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 4,442 | 2025 |
| Median Household Income | $81,411 | 2020-2024 |
| Median Home Value | $149,600 | 2020-2024 |
| Land Area | 4.12 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).