Platte is located in Charles mix county South dakota with a geographic area of 1.1 square miles. The total population in Platte is 1,290 with 47.1% male and 52.9% female. Children under age 5 represent 5.8% of the population, under age 18 equal 25.4% of the population and over age 65 is 20.1% of the population. The median household income is $55,273, per capita income is $30,172. There are a total of 577 housing units with 73.0% owner occupied. Education includes 37.4% of residents that are high school graduates and 23.7% with a bachelor's degree or higher. The average temperature in Platte in the summer is 70 degrees, and in the winter 15 degrees.