Granville is located in Sioux county Iowa with a geographic area of 0.3 square miles. The total population in Granville is 317 with 50.2% male and 49.8% female. Children under age 5 represent 4.1% of the population, under age 18 equal 27.4% of the population and over age 65 is 21.5% of the population. The median household income is $50,625, per capita income is $28,795. There are a total of 136 housing units with 72.1% owner occupied. Education includes 30.9% of residents that are high school graduates and 15.4% with a bachelor's degree or higher. The average temperature in Granville in the summer is 72 degrees, and in the winter 23 degrees.