Rock hill is located in St. louis county Missouri with a geographic area of 1.1 square miles. The total population in Rock hill is 4,634 with 48.2% male and 51.8% female. Children under age 5 represent 6.2% of the population, under age 18 equal 19.7% of the population and over age 65 is 12.1% of the population. The median household income is $75,895, per capita income is $50,020. There are a total of 2,093 housing units with 85.8% owner occupied. Education includes 6.9% of residents that are high school graduates and 70.4% with a bachelor's degree or higher. The average temperature in Rock hill in the summer is 77 degrees, and in the winter 32 degrees.
