South Portland, ME Demographics

A map of South Portland's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	21,242	21,979	78.9%	82.9%
Black	1,925	1,528	7.1%	5.8%
Multiracial	1,700	972	6.3%	3.7%
Hispanic	1,082	908	4.0%	3.4%
Asian	911	903	3.4%	3.4%
Native American/Other	70	208	0.3%	0.8%

South Portland, Maine has an estimated population of 26,930, a slight increase from the 26,498 recorded in the 2020 Census. The population is 78.9% White, 7.1% Black, 6.3% Multiracial, 4.0% Hispanic, 3.4% Asian, and 0.3% Native American/Other. This demographic dot map shows the population of South Portland, with one dot drawn for each person counted by the Census, color-coded by race.

South Portland has become considerably more racially diverse since the 2020 Census. It is considerably more diverse than Maine overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In South Portland, that probability was 30.5% in 2020 and 36.6% in the most recent ACS estimates.

South Portland is ranked the 4th most populous place in Maine, out of 155 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). South Portland was ranked the 4th most populous place in the 2020 Census.

South Portland's White Population

21,242 residents of South Portland, or 78.9% of the population, identify as White. The share of White residents in South Portland is considerably lower than in Maine overall, where 89.9% of the population is White. South Portland ranks 149th statewide in terms of White residents as a share of the population, out of 155 places.

Since the 2020 Census, South Portland's White population has declined by an estimated 3.4%. White residents' share of South Portland's population has decreased from 82.9% to 78.9%.

South Portland is more White than neighboring Portland (77.5% White). South Portland is less White than neighboring Oak Hill (94.5% White), Westbrook (80.5% White), Falmouth (85.4% White), and Dunstan (90.4% White).

South Portland's Black Population

1,925 residents of South Portland, or 7.1% of the population, identify as Black. The share of Black residents in South Portland is higher than in Maine overall, where 1.8% of the population is Black. South Portland ranks 6th statewide in terms of Black residents as a share of the population, out of 155 places.

Since the 2020 Census, South Portland's Black population has grown by an estimated 26.0%. Black residents' share of South Portland's population has increased from 5.8% to 7.1%.

South Portland is more Black than neighboring Oak Hill (0% Black), Westbrook (4.7% Black), Falmouth (1.8% Black), and Dunstan (1.9% Black). South Portland is less Black than neighboring Portland (9.1% Black).

South Portland's Asian Population

911 residents of South Portland, or 3.4% of the population, identify as Asian. The share of Asian residents in South Portland is slightly higher than in Maine overall, where 1.1% of the population is Asian. South Portland ranks 8th statewide in terms of Asian residents as a share of the population, out of 155 places.

Since the 2020 Census, South Portland's Asian population has remained roughly the same. Asian residents' share of South Portland's population has remained roughly unchanged at 3.4%.

South Portland is more Asian than neighboring Oak Hill (0.3% Asian), Westbrook (2.1% Asian), and Falmouth (1.3% Asian). South Portland is less Asian than neighboring Portland (3.9% Asian), and Dunstan (4.5% Asian).

South Portland's Hispanic Population

1,082 residents of South Portland, or 4.0% of the population, identify as Hispanic. The share of Hispanic residents in South Portland is comparable to the share in Maine overall, where 2.2% of the population is Hispanic. South Portland ranks 9th statewide in terms of Hispanic residents as a share of the population, out of 155 places.

Since the 2020 Census, South Portland's Hispanic population has grown by an estimated 19.2%. Hispanic residents' share of South Portland's population has increased from 3.4% to 4.0%.

South Portland is more Hispanic than neighboring Oak Hill (3.7% Hispanic), Westbrook (3.8% Hispanic), Falmouth (3.5% Hispanic), Portland (3.1% Hispanic), and Dunstan (0.5% Hispanic).

South Portland's Native American/Other Population

70 residents of South Portland, or 0.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in South Portland is comparable to the share in Maine overall, where 0.7% of the population is Native American/Other. South Portland ranks 62nd statewide in terms of Native American/Other residents as a share of the population, out of 155 places.

Since the 2020 Census, South Portland's Native American/Other population has declined by an estimated 66.3%. Native American/Other residents' share of South Portland's population has decreased from 0.8% to 0.3%.

South Portland is more Native American/Other than neighboring Oak Hill (0.2% Native American/Other), Falmouth (0% Native American/Other), and Dunstan (0% Native American/Other). South Portland is less Native American/Other than neighboring Westbrook (1.5% Native American/Other), and Portland (0.5% Native American/Other).

South Portland's Multiracial Population

1,700 residents of South Portland, or 6.3% of the population, identify as Multiracial. The share of Multiracial residents in South Portland is slightly higher than in Maine overall, where 4.2% of the population is Multiracial. South Portland ranks 87th statewide in terms of Multiracial residents as a share of the population, out of 155 places.

Since the 2020 Census, South Portland's Multiracial population has grown by an estimated 74.9%. Multiracial residents' share of South Portland's population has increased from 3.7% to 6.3%.

South Portland is more Multiracial than neighboring Oak Hill (1.3% Multiracial), Portland (5.9% Multiracial), and Dunstan (2.7% Multiracial). South Portland is less Multiracial than neighboring Westbrook (7.4% Multiracial), and Falmouth (8% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.