Grantsville is located in Tooele county Utah with a geographic area of 37.5 square miles. The total population in Grantsville is 11,488 with 55.8% male and 44.2% female. Children under age 5 represent 7.5% of the population, under age 18 equal 38.5% of the population and over age 65 is 7.6% of the population. The median household income is $76,771, per capita income is $26,827. There are a total of 3,108 housing units with 85.1% owner occupied. Education includes 34.6% of residents that are high school graduates and 25.1% with a bachelor's degree or higher. The average temperature in Grantsville in the summer is 70 degrees, and in the winter 30 degrees.