Wall lake is located in Sac county Iowa with a geographic area of 1.1 square miles. The total population in Wall lake is 759 with 50.9% male and 49.1% female. Children under age 5 represent 6.9% of the population, under age 18 equal 24.0% of the population and over age 65 is 32.0% of the population. The median household income is $51,250, per capita income is $27,612. There are a total of 340 housing units with 78.5% owner occupied. Education includes 39.7% of residents that are high school graduates and 14.7% with a bachelor's degree or higher. The average temperature in Wall lake in the summer is 71 degrees, and in the winter 23 degrees.