Clear lake is located in Deuel county South dakota with a geographic area of 3.0 square miles. The total population in Clear lake is 1,503 with 49.8% male and 50.2% female. Children under age 5 represent 3.9% of the population, under age 18 equal 20.1% of the population and over age 65 is 26.3% of the population. The median household income is $60,000, per capita income is $28,144. There are a total of 620 housing units with 68.7% owner occupied. Education includes 27.9% of residents that are high school graduates and 20.2% with a bachelor's degree or higher. The average temperature in Clear lake in the summer is 69 degrees, and in the winter 15 degrees.