|Motto: The Third Largest Town in Illinois|
|Area||3.64 sq mi (9 km2)|
|- land||3.63 sq mi (9 km2)|
|- water||0.01 sq mi (0 km2)|
|Density||1,176.3 / sq mi (454 / km2)|
|Incorporated||February 16, 1865|
|- summer (DST)||CDT (UTC-5)|
|Wikimedia Commons: Cortland, Illinois|
Cortland is an incorporated town in DeKalb County, Illinois, United States. The population was 4,270 at the 2010 census, up from 2,066 at the 2000 census. 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.
Cortland is located at (41.924857, -88.693093).
According to the 2010 census, the town has a total area of 3.64 square miles (9.4 km2), of which 3.63 square miles (9.4 km2) (or 99.73%) is land and 0.01 square miles (0.026 km2) (or 0.27%) is water. The town is located immediately east of the city of DeKalb and just south of the city of Sycamore.
As of the census of 2000, there were 2,066 people, 701 households, and 553 families residing in the town. The population density was 1,176.3 people per square mile (453.2/km²). There were 723 housing units at an average density of 411.6 per square mile (158.6/km²). The racial makeup of the town was 95.11% White, 1.21% African American, 0.05% Native American, 1.26% Asian, 0.97% from other races, and 1.40% from two or more races. Hispanic or Latino of any race were 4.40% of the population.
There were 701 households out of which 50.2% had children under the age of 18 living with them, 65.6% were married couples living together, 9.6% had a female householder with no husband present, and 21.1% were non-families. 16.8% of all households were made up of individuals and 3.6% had someone living alone who was 65 years of age or older. The average household size was 2.95 and the average family size was 3.35.
In the town, the population was spread out with 35.1% under the age of 18, 7.2% from 18 to 24, 37.4% from 25 to 44, 14.8% from 45 to 64, and 5.5% who were 65 years of age or older. The median age was 30 years. For every 100 females there were 96.2 males. For every 100 females age 18 and over, there were 98.5 males.
The median income for a household in the town was $52,750, and the median income for a family was $57,361. Males had a median income of $43,920 versus $26,107 for females. The per capita income for the town was $18,775. About 3.2% of families and 3.7% of the population were below the poverty line, including 4.8% of those under age 18 and none of those age 65 or over.
- Illinois Regional Archives Depository System. "Name Index to Illinois Local Governments". Illinois State Archives. Illinois Secretary of State. Retrieved May 2, 2013.
- "DeKalb County". Jim Forte Postal History. Retrieved 28 February 2015.
- Company, Chicago and North Western Railway (1908). A History of the Origin of the Place Names Connected with the Chicago & North Western and Chicago, St. Paul, Minneapolis & Omaha Railways. p. 59.
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