Decatur city, Illinois
Official LSAD Designation: Decatur city • Census GEOID: 1718823
• Macon County
Decatur city is an incorporated city in Macon County, Illinois. According to official records from the Census (2025), Decatur city had an estimated population of 67,884 residents. Official Census Bureau geographic records classify this community under LSAD designation Decatur city (GEOID 1718823).
Local Government Administration U.S. Census Bureau GMAF
City Of Decatur
Municipal
Official Title:
Finance Director
Address:
1 GARY K ANDERSON PLZ, DECATUR IL 62523-1196
County Of Macon
County
Official Title:
Auditor
Address:
141 S MAIN ST, DECATUR IL 62523-6033
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 67,884 | 2025 |
| Median Household Income | $51,592 | 2020-2024 |
| Median Home Value | $99,600 | 2020-2024 |
| Land Area | 44.16 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).