Birchwood is located in Washburn county Wisconsin with a geographic area of 1.1 square miles. The total population in Birchwood is 345 with 50.1% male and 49.9% female. Children under age 5 represent 5.5% of the population, under age 18 equal 23.5% of the population and over age 65 is 27.2% of the population. The median household income is $49,875, per capita income is $24,786. There are a total of 161 housing units with 60.9% owner occupied. Education includes 37.9% of residents that are high school graduates and 11.8% with a bachelor's degree or higher. The average temperature in Birchwood in the summer is 66 degrees, and in the winter 17 degrees.