Cortland town, Illinois
Official LSAD Designation: Cortland town • Census GEOID: 1716470
• DeKalb County
Cortland town is an incorporated town in DeKalb County, Illinois. According to official records from the Census (2025), Cortland town had an estimated population of 4,676 residents. Official Census Bureau geographic records classify this community under LSAD designation Cortland town (GEOID 1716470).
Local Government Administration U.S. Census Bureau GMAF
Town Of Cortland
Municipal
Official Title:
Finance Director/treasurer
Address:
PO BOX 519, CORTLAND IL 60112-0519
County Of Dekalb
County
Official Title:
County Administrator
Address:
200 N MAIN ST, SYCAMORE IL 60178-1431
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 4,676 | 2025 |
| Median Household Income | $73,971 | 2020-2024 |
| Median Home Value | $233,200 | 2020-2024 |
| Land Area | 3.62 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).