Cortland Map
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°55?29?N 88°41?35?W / 41.92472°N 88.69306°W / 41.92472; -88.69306 (41.924857, -88.693093).
According to the United States Census Bureau, the town has a total area of 1.8 square miles (4.6 km²), all of it land. The town is located immediately east of the city of DeKalb and just south of the city of Sycamore.
Nearby cities include Kaneville, Hinckley, Waterman, Elburn, Burlington.