Sister bay is located in Door county Wisconsin with a geographic area of 2.6 square miles. The total population in Sister bay is 873 with 45.1% male and 54.9% female. Children under age 5 represent 13.5% of the population, under age 18 equal 23.5% of the population and over age 65 is 40.4% of the population. The median household income is $40,809, per capita income is $25,587. There are a total of 457 housing units with 47.7% owner occupied. Education includes 14.0% of residents that are high school graduates and 41.4% with a bachelor's degree or higher. The average temperature in Sister bay in the summer is 66 degrees, and in the winter 17 degrees.
