Delta is located in Delta county Colorado with a geographic area of 13.3 square miles. The total population in Delta is 8,893 with 51.1% male and 48.9% female. Children under age 5 represent 4.4% of the population, under age 18 equal 22.6% of the population and over age 65 is 24.4% of the population. The median household income is $40,841, per capita income is $20,995. There are a total of 3,469 housing units with 61.9% owner occupied. Education includes 37.8% of residents that are high school graduates and 20.4% with a bachelor's degree or higher. The average temperature in Delta in the summer is 71 degrees, and in the winter 29 degrees.