Cortland
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The Cortland album
Outdoors in Cortland
Parks & trails →Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US
About Cortland
Town in Illinois, United StatesCortland is an incorporated town in DeKalb County, Illinois, United States. The population was 4,398 at the 2020 Census. It was previously 4,270 at the 2010 census, up from 2,066 in 2000. Because of its status as an incorporated town, Cortland has adopted the slogan, "The Third Largest Town in Illinois". Only the towns of Cicero and Normal are larger, in terms of population. Most municipalities in Illinois are defined as "cities" or "villages."
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
How Cortland ranks
All →Town numbers
Housing in Cortland
The median sale price was $320,000 in May 2026.
A balanced market
Safety in Cortland
Safety Grade A-
Cortland reports less crime per resident than 77% of the U.S. towns and cities we grade.
Work & commute in Cortland
Full picture →Most working residents leave Cortland for work: only 2% work in town. The top destinations are DeKalb (15%), Sycamore (10%) and Aurora (4%). Half commute less than 21 miles.
Health in Cortland
Health Grade B+
Healthier than 73% of U.S. towns on seven CDC estimates.
Compared with Illinois
of 32 measures CDC estimates. The other 21 are too close to call.
What stands out
Care nearby
Natural hazards in Cortland
Expected storm and flood damage is higher than in 26% of U.S. communities.
Climate in Cortland
Full climate →Cortland has cold, snowy winters and pleasant summers. A typical July afternoon reaches 83°, a January night drops to 14°, and about 33 inches of snow falls in a normal winter.
Cortland’s library
Library details →Where Cortland is
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