Mercer is located in Iron county Wisconsin with a geographic area of 4.5 square miles. The total population in Mercer is 507 with 48.9% male and 51.1% female. Children under age 5 represent 4.9% of the population, under age 18 equal 15.6% of the population and over age 65 is 33.9% of the population. The median household income is $53,571, per capita income is $32,633. There are a total of 268 housing units with 67.9% owner occupied. Education includes 21.3% of residents that are high school graduates and 20.5% with a bachelor's degree or higher. The average temperature in Mercer in the summer is 66 degrees, and in the winter 17 degrees.
