Mills river is located in Henderson county North carolina with a geographic area of 22.3 square miles. The total population in Mills river is 7,319 with 52.9% male and 47.1% female. Children under age 5 represent 5.5% of the population, under age 18 equal 20.7% of the population and over age 65 is 23.7% of the population. The median household income is $66,223, per capita income is $35,592. There are a total of 3,117 housing units with 79.1% owner occupied. Education includes 27.5% of residents that are high school graduates and 40.7% with a bachelor's degree or higher. The average temperature in Mills river in the summer is 75 degrees, and in the winter 38 degrees.