Onawa is located in Monona county Iowa with a geographic area of 5.3 square miles. The total population in Onawa is 2,788 with 45.6% male and 54.4% female. Children under age 5 represent 4.7% of the population, under age 18 equal 18.4% of the population and over age 65 is 22.1% of the population. The median household income is $40,530, per capita income is $24,893. There are a total of 1,298 housing units with 65.6% owner occupied. Education includes 39.4% of residents that are high school graduates and 11.4% with a bachelor's degree or higher. The average temperature in Onawa in the summer is 73 degrees, and in the winter 23 degrees.
