Harper is located in Gillespie county Texas with a geographic area of 56.6 square miles. The total population in Harper is 1,391 with 50.0% male and 50.0% female. Children under age 5 represent 2.9% of the population, under age 18 equal 29.2% of the population and over age 65 is 16.0% of the population. The median household income is $56,964, per capita income is $26,985. There are a total of 511 housing units with 71.8% owner occupied. Education includes 22.3% of residents that are high school graduates and 29.2% with a bachelor's degree or higher. The average temperature in Harper in the summer is 83 degrees, and in the winter 49 degrees.