Chelsea is located in Washtenaw county Michigan with a geographic area of 3.6 square miles. The total population in Chelsea is 5,378 with 45.0% male and 55.0% female. Children under age 5 represent 4.3% of the population, under age 18 equal 18.3% of the population and over age 65 is 30.7% of the population. The median household income is $66,250, per capita income is $47,008. There are a total of 2,562 housing units with 64.5% owner occupied. Education includes 10.6% of residents that are high school graduates and 50.0% with a bachelor's degree or higher. The average temperature in Chelsea in the summer is 67 degrees, and in the winter 23 degrees.