South Portland, Maine Population 2021

25,364
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South Portland is a city located in Cumberland County Maine. With a 2020 population of 25,364, it is the 4th largest city in Maine (after Portland, Lewiston, and Bangor) and the 1524th largest city in the United States . South Portland is currently declining at a rate of -0.33% annually but its population has increased by 1.45% since the most recent census, which recorded a population of 25,002 in 2010. South Portland reached it's highest population of 25,616 in 2018. Spanning over 14 miles, South Portland has a population density of 2,102 people per square mile.

The average household income in South Portland is $87,097 with a poverty rate of 8.81%. The median rental costs in recent years comes to $1,305 per month, and the median house value is $257,200. The median age in South Portland is 41.9 years, 39.5 years for males, and 43.4 years for females.

South Portland Demographics

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

  • White: 89.85%
  • Black or African American: 4.31%
  • Two or more races: 3.38%
  • Asian: 1.64%
  • Other race: 0.48%
  • Native American: 0.34%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of South Portland, Maine is 25,364 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 25,616.The last official US Census in 2010 recorded the population at 25,002.

South Portland, Maine Population 2021

2019 and 2020 population is estimated by projecting the raw 2018 numbers.

Year Population Growth Growth Rate
2021545,0363,2680.60%
2020541,7683,2680.60%
2019538,5003,2680.61%
2018535,2323,3330.62%
2017531,8992,9870.56%
2016528,9123,0810.58%
2015525,8311,8420.35%
2014523,9894,0020.76%
2013519,9872,3550.45%
2012517,6321,5620.30%
2011516,0702,1590.42%
2010513,9110.00%

South Portland Metro Area Population by Year

Population by Race

Race Population Percentage
White22,95489.85%
Black or African American1,1004.31%
Two or More Races8633.38%
Asian4201.64%
Some Other Race1230.48%
American Indian and Alaska Native880.34%
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South Portland Population by Race

South Portland Population Pyramid $2021

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South Portland Median Age

41.9


Total

39.5


Male

43.4


Female

South Portland Adults

There are 20,970 adults, (4,268 of whom are seniors) in South Portland.

South Portland Age Dependency

53

Age Dependency Ratio

25.6

Old Age Dependency Ratio

27.4

Child Dependency Ratio

South Portland Sex Ratio

Female

13,304

52.07%

Male

12,244

47.93%

South Portland Population by Age

South Portland Renter vs Owner Occupied by Household Type

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South Portland Household Types

Type Owner Renter
Married77.5%22.5%
All63.4%36.6%
Non Family55.5%44.5%
Male53%47%
Female46.9%53.1%

63.4%

Rate of Home Ownership

South Portland Households and Families

Type Count Average Size Owned
All10,8562.2963.4
Married4,4973.0177.5
Non Family4,4421.2855.5
Female1,3253.0746.9
Male5922.7453

2.91

Average Family Size

2.29

Average Household Size

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South Portland Households by Type

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Education Attained Count Percentage
Less Than 9th Grade3371.84%
9th to 12th Grade4042.20%
High School Graduate4,04022.05%
Some College3,35818.32%
Associates Degree1,8069.85%
Bachelors Degree5,32129.04%
Graduate Degree3,06016.70%
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South Portland Educational Attainment by Sex (over 25)

South Portland Educational Attainment by Race

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Race Total High School Bachelors
White16,69516,1337,707
Black599598206
Hispanic465415244
Asian350257138
2+ Races288253112
Other Race926060
Native American6363

The highest rate of high school graduation is among native american people with a rate of 100.00%.

The highest rate of bachelors degrees is among other race people with a rate of 65.22%.

South Portland Educational Attainment by Race

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Name Average Male Female
Overall$43,041$47,736$39,298
Less Than 9th Grade$28,831$24,417$31,792
High School Graduate$32,500$35,128$27,754
Some College$38,341$41,510$36,223
Bachelors Degree$49,970$56,250$43,645
Graduate Degree$61,272$67,130$59,781

$43,041

Average Earnings

$47,736

Average Male

$39,298

Average Female

South Portland Earnings by Educational Attainment

South Portland Language by Age

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South Portland Language

88.37% of South Portland residents speak only English, while 11.63% speak other languages. The non-English language spoken by the largest group is Other languages, which is spoken by 4.40% of the population.

South Portland Language

South Portland Poverty by Race

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Name Total In Poverty Poverty Rate
White21,9641,9318.79%
Hispanic68413920.32%
Multiple7909512.03%
Native882427.27%
Black1,016191.87%
Other12375.69%

8.81%

Overall Poverty Rate

9.12%

Male Poverty Rate

8.52%

Female Poverty Rate

Poverty in South Portland

The race most likely to be in poverty in South Portland is Native, with 27.27% below the poverty level.

The race least likely to be in poverty in South Portland is Black, with 1.87% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.62%. Among those working part-time, it was 8.16%, and for those that did not work, the poverty rate was 18.77%.

South Portland Poverty

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Name Poverty
High School11.17%
Less Than 9th Grade10.66%
Some College9.46%
Bachelors or Greater4.32%

South Portland Poverty Rate by Education

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Rate Poverty
Female Unemployed41.18%
Male Unemployed29.21%
Male Employed3.16%
Female Employed3.11%

South Portland Poverty Rate by Employment Status and Sex

South Portland Income by Household Type

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Name Median Mean
Households$69,290$87,097
Families$88,005$102,713
Married Families$100,934-
Non Families$47,219$59,906
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Income by Household Type

South Portland Marital Status

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Marriage Rates

43.1%

Overall Marriage Rate

46.2%

Male Marriage Rate

40.4%

Female Marriage Rate

South Portland Married by Age and Sex

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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

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South Portland Marital Status

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1,329

Number of Veterans

1,278

Male Veterans

51

Female Veterans

War Veterans
Vietnam556
Second Gulf War174
First Gulf War128
Korea105
World War II97

South Portland Veterans by War

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Age Group Veterans
65 to 74391
75+389
35 to 54363
55 to 64158
18 to 3428

South Portland Veterans by Age

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Name Veterans % of Total
White1,2666.65%
Hispanic316.95%
Asian256.41%
Native American2438.10%
Other Race1414.14%

South Portland Veterans by Race

South Portland Veterans by Education

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4.92%

Veteran Poverty Rate

23.56%

Veteran Disability Rate

South Portland Veterans by Education

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71.6%

Labor Force Participation

67.7%

Employment Rate

4.8%

Unemployment Rate

South Portland Employment by Age

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South Portland Employment by Race

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South Portland Employment by Education

Origin of Non-Citizens

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

Origin of Naturalized Citizens

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57.93%

Born in South Portland

90.58%

Native Born

9.42%

Foreign Born

4.24%

Non Citizen

5.18%

Naturalized

Place of Birth

90.58% of South Portland residents were born in the United States, with 57.93% having been born in Maine. 4.24% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Africa.

South Portland Place of Birth

Year Population Growth Annual Growth Rate
202125,364-84-0.33%
202025,448-84-0.33%
201925,532-84-0.33%
201825,6161420.56%
201725,474-82-0.32%
201625,556200.08%
201525,536550.22%
201425,4812040.81%
201325,2771770.71%
201225,100280.11%
201125,072780.31%
201024,9941,6700.69%
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%

South Portland Population by Year