The population of illinois, "The Prairie State," averages around 12,419,290 people according to census records. Currently, you can find 160,977 illinois homes for sale and 50,896 foreclosure homes for sale on HGTV's FrontDoor.com. You can find 674 homes for sale listings with open house dates and times on HGTV's FrontDoor.com, as well as 28,344 homes for sale listings with enhanced virtual tours. The top cities in illinois are: Chicago homes for sale, Aurora homes for sale, Rockford homes for sale, Elgin homes for sale, and Naperville homes for sale.