Clayton is located in Union county New mexico with a geographic area of 7.8 square miles. The total population in Clayton is 3,079 with 53.7% male and 46.3% female. Children under age 5 represent 5.3% of the population, under age 18 equal 17.2% of the population and over age 65 is 20.7% of the population. The median household income is $30,040, per capita income is $20,555. There are a total of 981 housing units with 57.8% owner occupied. Education includes 55.4% of residents that are high school graduates and 12.5% with a bachelor's degree or higher. The average temperature in Clayton in the summer is 71 degrees, and in the winter 32 degrees.