Cortland, DeKalb County, Illinois
Town in DeKalb County, Illinois · ZIP 60112, 60151
- DeKalb County
- Within Cortland Township
- Census data · ACS 2019-2023
- 1 public schools
- 4,592 (2024 estimate)Population
- 1,577Households
- $82,750Median household income
- $203,700Median home value
- 1Public schools
- 2ZIP codes
About Cortland
This page shows only what has been published about Cortland: Census facts with their sources first, then its businesses, jobs, events, people in public roles, housing and questions as they are added. Nothing here is written by the town government.
Town intelligenceOfficial sources, refreshed yearly
| Census | Population |
|---|---|
| 2000 | 2,066 |
| 2010 | 4,270 |
| 2020 | 4,398 |
As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.
Sources: Census 2000 Summary File 1: total population, place level, state 17, retrieved November 14, 2026; Census 2010 Summary File 1: total population, place level, state 17, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, place level, state 17, retrieved November 14, 2026.
Median household income $82,750 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.
Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, place level, state 17, retrieved November 14, 2026.
- Owner occupied
- 1,215 units
- Renter occupied
- 362 units
- Vacancy rate
- 3.3%
Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.
Source: American Community Survey 5-year data profile 2019–2023, place level, state 17, retrieved November 14, 2026.
| Measure | Cortland | DeKalb County | Illinois |
|---|---|---|---|
| Population | 4,556 | 100,512 | 12,692,653 |
| Median household income | $82,750 | $69,022 | $81,702 |
| Median age | 31.9 | 32.6 | 38.9 |
| Median home value | $203,700 | $231,900 | $250,500 |
| Bachelor’s degree or higher | 31.1% | 32.7% | 37.2% |
| Foreign-born residents | 2.3% | 6.4% | 14.4% |
| Owner-occupied homes | 77.0% | 60.9% | 66.8% |
| Mean commute to work | 27.4 minutes | 26.7 minutes | 28.1 minutes |
Source: American Community Survey 5-year data profile 2019–2023, place level, state 17, retrieved November 14, 2026.
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Events in CortlandAll events
No upcoming event is listed in Cortland yet. Members and businesses add events from the Events page; each is screened before it shows.
Schools
| School | Type | Grades | District |
|---|---|---|---|
| Cortland Elementary School | Public | K–5 | DeKalb CUSD 428 |
Open public schools in the NCES directory for 2023–2024, placed by their listed location; private schools are not in the source. Enrollment and ratings are not shown.
Sources: NCES Common Core of Data, public school directory 2023–2024, retrieved November 14, 2026; NCES EDGE public school geocodes 2024–2025, retrieved November 14, 2026.
Frequently asked about CortlandPromoted from questions people asked
No question about Cortland has been asked often enough to publish an answer yet. Ask Cortland and the answer, once a person checks it, appears here.
Nearby towns
- Cortland TownshipTownship
- DeKalbCity
- SycamoreCity
- DeKalb TownshipTownship
- Maple ParkVillage
- Pierce TownshipTownship
- Sycamore TownshipTownship
- Afton TownshipTownship
- Mayfield TownshipTownship
- Virgil TownshipTownship
Other towns in DeKalb County
- Afton TownshipTownship
- Clinton TownshipTownship
- Cortland TownshipTownship
- DeKalb TownshipTownship
- DeKalbCity
- Franklin TownshipTownship
- Genoa TownshipTownship
- GenoaCity
- HinckleyVillage
- Kingston TownshipTownship
Other places named Cortland in Illinois
- Cortland TownshipTownship