The median age in Summit Town, Waukesha County, Wisconsin is 50.1, as per 2021 ACS 5-Year Estimates. Of the total population, 15.19% were under the age of 15, 15.19% aged 15 to 29, 49.01% aged 30 to 64, 19.57% aged 65 to 84, and 1.05% were 85 years of age and older.