Lincoln is located in Penobscot county Maine with a geographic area of 7.4 square miles. The total population in Lincoln is 2,606 with 47.6% male and 52.4% female. Children under age 5 represent 3.1% of the population, under age 18 equal 9.5% of the population and over age 65 is 38.1% of the population. The median household income is $24,921, per capita income is $21,825. There are a total of 1,485 housing units with 55.5% owner occupied. Education includes 54.0% of residents that are high school graduates and 14.4% with a bachelor's degree or higher. The average temperature in Lincoln in the summer is 68 degrees, and in the winter 25 degrees.