Williston is located in Williams county North dakota with a geographic area of 23.2 square miles. The total population in Williston is 27,812 with 53.7% male and 46.3% female. Children under age 5 represent 9.4% of the population, under age 18 equal 27.4% of the population and over age 65 is 8.1% of the population. The median household income is $76,873, per capita income is $43,540. There are a total of 11,674 housing units with 46.3% owner occupied. Education includes 28.4% of residents that are high school graduates and 26.0% with a bachelor's degree or higher. The average temperature in Williston in the summer is 67 degrees, and in the winter 10 degrees.