South Portland is a city located in Maine. With a 2020 population of 25,474, it is the 4th largest city in Maine (after Portland, Lewiston, and Bangor) and the 1503rd largest city in the United States. South Portland is currently declining at a rate of -0.26% annually but its population has increased by 1.89% since the most recent census, which recorded a population of 25,002 in 2010. South Portland reached it's highest population of 25,606 in 2018. Spanning over 14 miles, South Portland has a population density of 2,111 people per square mile.
The average household income in South Portland is $83,634 with a poverty rate of 9.57%. The median rental costs in recent years comes to $1,226 per month, and the median house value is $247,900. The median age in South Portland is 41.5 years, 39.7 years for males, and 42.7 years for females. For every 100 females there are 90.0 males.