Southport is located in Lincoln county Maine with a geographic area of square miles. The total population in Southport is 487 with 44.8% male and 55.2% female. Children under age 5 represent 0.2% of the population, under age 18 equal 6.4% of the population and over age 65 is 58.7% of the population. The median household income is $53,906, per capita income is $47,592. There are a total of 290 housing units with 95.5% owner occupied. Education includes 16.6% of residents that are high school graduates and 54.1% with a bachelor's degree or higher. The average temperature in Southport in the summer is 68 degrees, and in the winter 25 degrees.