Norwalk is located in Warren county Iowa with a geographic area of 11.6 square miles. The total population in Norwalk is 11,467 with 48.6% male and 51.4% female. Children under age 5 represent 6.7% of the population, under age 18 equal 27.7% of the population and over age 65 is 12.6% of the population. The median household income is $83,241, per capita income is $40,313. There are a total of 4,564 housing units with 80.4% owner occupied. Education includes 23.5% of residents that are high school graduates and 43.1% with a bachelor's degree or higher. The average temperature in Norwalk in the summer is 74 degrees, and in the winter 23 degrees.
