Dexter is located in Dallas county Iowa with a geographic area of 1.3 square miles. The total population in Dexter is 564 with 47.2% male and 52.8% female. Children under age 5 represent 5.7% of the population, under age 18 equal 21.3% of the population and over age 65 is 21.5% of the population. The median household income is $58,125, per capita income is $29,697. There are a total of 233 housing units with 79.0% owner occupied. Education includes 41.2% of residents that are high school graduates and 22.7% with a bachelor's degree or higher. The average temperature in Dexter in the summer is 72 degrees, and in the winter 23 degrees.