Quincy city, Illinois
Official LSAD Designation: Quincy city • Census GEOID: 1762367
• Adams County
Quincy city is an incorporated city in Adams County, Illinois. According to official records from the Census (2025), Quincy city had an estimated population of 38,918 residents. Official Census Bureau geographic records classify this community under LSAD designation Quincy city (GEOID 1762367).
Local Government Administration U.S. Census Bureau GMAF
City Of Quincy
Municipal
Official Title:
Sr Accountant
Address:
730 MAINE ST, LBBY 1, QUINCY IL 62301-4053
County Of Adams
County
Official Title:
County Clerk
Address:
507 VERMONT ST, QUINCY IL 62301-2920
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 38,918 | 2025 |
| Median Household Income | $56,480 | 2020-2024 |
| Median Home Value | $153,200 | 2020-2024 |
| Land Area | 15.92 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).