Addison is a city located in DuPage County, Illinois. With a 2020 population of 36,408, it is the 51st largest city in Illinois and the 1078th largest city in the United States. Addison is currently declining at a rate of -0.43% annually and its population has decreased by -1.45% since the most recent census, which recorded a population of 36,942 in 2010. Addison reached it's highest population of 37,483 in 2013. Spanning over 10 miles, Addison has a population density of 3,700 people per square mile.
The average household income in Addison is $78,729 with a poverty rate of 12.89%. The median rental costs in recent years comes to $1,008 per month, and the median house value is $243,500. The median age in Addison is 36.3 years, 35.4 years for males, and 37.2 years for females. For every 100 females there are 97.1 males.