From a total population of 4,375, Cortland has a median age of 28.4. The average age of males, in Cortland, is 29.1 while the average age of females is 28.3. When you compare this to median age of Illinois, Cortland is 8.6 years younger.
The median income of individuals, in Cortland, is $22,403 while the average household income is $75,160. When comparing the median income of people living in Cortland to the rest of Illinois, the average income in Cortland is $7,616 less.