St. ansgar is located in Mitchell county Iowa with a geographic area of 1.1 square miles. The total population in St. ansgar is 1,144 with 51.0% male and 49.0% female. Children under age 5 represent 9.1% of the population, under age 18 equal 25.9% of the population and over age 65 is 22.9% of the population. The median household income is $65,536, per capita income is $33,885. There are a total of 465 housing units with 77.4% owner occupied. Education includes 32.0% of residents that are high school graduates and 23.7% with a bachelor's degree or higher. The average temperature in St. ansgar in the summer is 72 degrees, and in the winter 23 degrees.