2.77 and the average family size was 3.11. The median age in the city was 31.6 years. 31.1% of residents were under the age of 18; 5.9% were between the ages of 18 and 24; 37.7% were from 25 to 44; 18.8% were from 45 to 64; and 6.4% were 65 years of age or older. The gender makeup of the city was 50.5% male and 49.5% female. Controversy Summerset is totally an example of urban sprawl. Many subdivisions and master-planned communities are found in or near Summerset. It is contiguous to other urbanized areas, is served by Interstate 90 which runs through the middle of the city, and a state highway which runs parallel to the interstate highway. References External links Summerset: S.D.’s newest town gets set up while fending off troubles article at the Rapid City Journal's website Summerset incorporation Cities in South Dakota Cities in Meade County, South Dakota Rapid City, South Dakota metropolitan area