Dedham is located in Carroll county Iowa with a geographic area of 0.6 square miles. The total population in Dedham is 250 with 54.8% male and 45.2% female. Children under age 5 represent 6.4% of the population, under age 18 equal 23.2% of the population and over age 65 is 17.2% of the population. The median household income is $61,250, per capita income is $26,924. There are a total of 107 housing units with 99.1% owner occupied. Education includes 38.3% of residents that are high school graduates and 8.4% with a bachelor's degree or higher. The average temperature in Dedham in the summer is 72 degrees, and in the winter 23 degrees.