Plymouth is located in Hennepin county Minnesota with a geographic area of 32.7 square miles. The total population in Plymouth is 78,879 with 49.6% male and 50.4% female. Children under age 5 represent 6.4% of the population, under age 18 equal 23.6% of the population and over age 65 is 15.7% of the population. The median household income is $112,631, per capita income is $58,562. There are a total of 31,470 housing units with 72.7% owner occupied. Education includes 10.0% of residents that are high school graduates and 64.4% with a bachelor's degree or higher. The average temperature in Plymouth in the summer is 68 degrees, and in the winter 9 degrees.