Chelsea is located in Rogers county Oklahoma with a geographic area of 1.8 square miles. The total population in Chelsea is 2,158 with 48.1% male and 51.9% female. Children under age 5 represent 7.1% of the population, under age 18 equal 27.9% of the population and over age 65 is 11.4% of the population. The median household income is $37,034, per capita income is $17,623. There are a total of 829 housing units with 57.8% owner occupied. Education includes 43.9% of residents that are high school graduates and 9.3% with a bachelor's degree or higher. The average temperature in Chelsea in the summer is 80 degrees, and in the winter 42 degrees.