Guntersville is located in Marshall county Alabama with a geographic area of 25.6 square miles. The total population in Guntersville is 8,531 with 51.1% male and 48.9% female. Children under age 5 represent 7.2% of the population, under age 18 equal 22.2% of the population and over age 65 is 20.1% of the population. The median household income is $50,142, per capita income is $29,995. There are a total of 3,178 housing units with 64.9% owner occupied. Education includes 21.2% of residents that are high school graduates and 38.5% with a bachelor's degree or higher. The average temperature in Guntersville in the summer is 78 degrees, and in the winter 43 degrees.