Jenison is located in Ottawa county Michigan with a geographic area of 5.9 square miles. The total population in Jenison is 17,851 with 47.3% male and 52.7% female. Children under age 5 represent 6.7% of the population, under age 18 equal 24.3% of the population and over age 65 is 22.6% of the population. The median household income is $71,720, per capita income is $30,727. There are a total of 6,978 housing units with 82.4% owner occupied. Education includes 34.0% of residents that are high school graduates and 26.5% with a bachelor's degree or higher. The average temperature in Jenison in the summer is 67 degrees, and in the winter 23 degrees.