The population of colorado, "The Centennial State," averages around 4,301,261 people according to census records. Currently, you can find 88,085 colorado homes for sale and 17,248 foreclosure homes for sale on HGTV's FrontDoor.com. You can find 43 homes for sale listings with open house dates and times on HGTV's FrontDoor.com, as well as 10,514 homes for sale listings with enhanced virtual tours. The top cities in colorado are: Denver homes for sale, Colorado Springs homes for sale, Aurora homes for sale, Littleton homes for sale, and Fort Collins homes for sale.