South Portland, Maine Population 2020

25,474

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, Juneau, and Lewiston) 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.

South Portland Demographics

According to the most recent ACS, the racial composition of South Portland was:

  • White: 90.21%
  • Black or African American: 3.79%
  • Two or more races: 3.28%
  • Asian: 1.92%
  • Other race: 0.40%
  • Native American: 0.39%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of South Portland, Maine is 25,474, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 25,606.The last official US Census in 2010 recorded the population at 25,002.

South Portland, Maine Population 2020

Year Total Population Growth Annual Growth Rate
2020541,7003,1400.58%
2019538,5603,1400.58%
2018535,4203,1400.59%
2017532,2803,3390.63%
2016528,9413,0150.57%
2015525,9261,8740.36%
2014524,0524,0220.77%
2013520,0302,4190.47%
2012517,6111,6070.31%
2011516,0042,1000.41%
2010513,9040.00%

Population by Race

Race Population Percentage
White23,01790.21%
Black or African American9683.79%
Two or More Races8383.28%
Asian4891.92%
Some Other Race1030.40%
American Indian and Alaska Native1000.39%

South Portland Population Pyramid 2020

South Portland Median Age

41.5


Total

39.7


Male

42.7


Female

South Portland Adults

There are 20,920 adults, (4,163 of whom are seniors) in South Portland.

South Portland Age Dependency

52.3

Age Dependency Ratio

24.8

Old Age Dependency Ratio

27.4

Child Dependency Ratio

South Portland Sex Ratio

Female

13,428

52.63%

Male

12,087

47.37%

South Portland Households and Families

South Portland Renter vs Owner Occupied by Household Type

South Portland Household Types

Type Owner Renter
Married79.7%20.3%
All62.2%37.8%
Male53.4%46.6%
Non Family52%48%
Female44.8%55.2%

62.2%

Rate of Home Ownership

Type Count Average Size Owned
All10,7832.3162.2
Non Family4,4181.2652
Married4,3233.0479.7
Female1,4633.0944.8
Male5792.953.4

2.94

Average Family Size

2.31

Average Household Size

9.3%

Unmarried (Opposite Sex)

0.3%

Unmarried (Same Sex)

South Portland Education

Education Attained Count Percentage
Less Than 9th Grade3672.03%
9th to 12th Grade3832.12%
High School Graduate3,99822.11%
Some College3,48219.25%
Associates Degree1,7019.41%
Bachelors Degree4,99327.61%
Graduate Degree3,16117.48%

South Portland Educational Attainment by Race

Name Total High School Bachelors
White16,55616,0067,564
Black549547203
Hispanic377315170
Asian35025195
Multiple Races298261109
Native American8464
Other Race644747

The highest rate of high school graduation is among black people with a rate of 99.64%.

The highest rate of bachelors degrees is among other race people with a rate of 73.44%.

Name Average Male Female
Overall$40,030$43,659$37,270
Less Than High School$22,269$20,833$27,153
High School Grad$30,247$34,745$25,568
Some College$36,423$37,333$35,374
Bachelors Degree$48,743$57,556$41,952
Graduate Degree$61,820$63,816$61,018

$40,030

Average Earnings

$43,659

Average Male

$37,270

Average Female

South Portland Language

South Portland Language by Age

South Portland Language

88.32% of South Portland residents speak only English, while 11.68% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 4.30% of the population.

South Portland Poverty

South Portland Poverty by Race

Name Total In Poverty Poverty Rate
White22,1532,0919.44%
Hispanic57714725.48%
Multiple7889612.18%
Black939454.79%
Native1003333.00%
Other10398.74%

9.57%

Overall Poverty Rate

10.27%

Male Poverty Rate

8.94%

Female Poverty Rate

Poverty in South Portland

The race most likely to be in poverty in South Portland is Native, with 33.00% below the poverty level.

The race least likely to be in poverty in South Portland is Black, with 4.79% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.11%. Among those working part-time, it was 8.11%, and for those that did not work, the poverty rate was 20.28%.

Name Poverty
Less Than High School17.84%
High School11.04%
Some College8.11%
Bachelors or Greater5.32%
Name Poverty
Female Unemployed40.97%
Male Unemployed28.82%
Male Employed3.84%
Female Employed2.80%

South Portland Income

South Portland Income by Household Type

Name Median Mean
Households$66,030$83,634
Families$83,003$99,452
Married Families$97,298-
Non Families$44,872$55,631

South Portland Marital Status

South Portland Marital Status

Marriage Rates

42.0%

Overall Marriage Rate

45.7%

Male Marriage Rate

38.9%

Female Marriage Rate

South Portland Married by Age and Sex

South Portland Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 45-54.

South Portland Marital Status by Race

South Portland Veterans

1,445

Number of Veterans

1,378

Male Veterans

67

Female Veterans

War Veterans
Vietnam634
Second Gulf War195
First Gulf War139
Korea121
World War II112
Name Veterans % of Total
White1,3767.20%
Asian359.11%
Hispanic348.59%
Indian1720.24%
Other1317.81%
2 or More40.78%

$South Portland Veterans by Education

4.74%

Veteran Poverty Rate

23.43%

Veteran Disability Rate

South Portland Employment Status

72%

Labor Force Participation

68.1%

Employment Rate

5.2%

Unemployment Rate

South Portland Place of Birth

Origin of Non-Citizens

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

58.47%

Born in Maine

90.62%

Native Born

9.38%

Foreign Born

4.03%

Non Citizen

Place of Birth

90.62% of South Portland residents were born in the United States, with 58.47% having been born in Maine. 4.03% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Africa.

Year Population Growth Annual Growth Rate
202025,474-66-0.26%
201925,540-66-0.26%
201825,6061340.53%
201725,472-66-0.26%
201625,538170.07%
201525,521570.22%
201425,4642050.81%
201325,2591790.71%
201225,080300.12%
201125,050740.30%
201024,9761,6520.69%
200023,3241610.07%
199023,1634510.20%
198022,712-555-0.24%
197023,2674790.21%
196022,7889220.41%
195021,8666,0853.32%
194015,7811,9411.32%
193013,8404,5864.11%
19209,2541,7832.16%
19107,4711,1841.74%
19006,2870.00%