Union is located in Knox county Maine with a geographic area of square miles. The total population in Union is 2,781 with 43.7% male and 56.3% female. Children under age 5 represent 11.8% of the population, under age 18 equal 27.3% of the population and over age 65 is 19.5% of the population. The median household income is $55,430, per capita income is $22,753. There are a total of 1,003 housing units with 83.6% owner occupied. Education includes 37.9% of residents that are high school graduates and 35.5% with a bachelor's degree or higher. The average temperature in Union in the summer is 68 degrees, and in the winter 25 degrees.
