Grantville is located in Coweta county Georgia with a geographic area of 5.8 square miles. The total population in Grantville is 3,273 with 45.8% male and 54.2% female. Children under age 5 represent 7.4% of the population, under age 18 equal 25.1% of the population and over age 65 is 6.9% of the population. The median household income is $73,833, per capita income is $24,440. There are a total of 1,054 housing units with 65.1% owner occupied. Education includes 38.2% of residents that are high school graduates and 12.1% with a bachelor's degree or higher. The average temperature in Grantville in the summer is 77 degrees, and in the winter 42 degrees.