South Portland, ME Profile: Facts, Map & Data


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South Portland, Maine - Basic Facts

The City of South Portland is the 4th largest city in Maine with a population of 25,583 as of July 1, 2016. South Portland ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Maine. See peer rankings below.

The primary coordinate point for South Portland is located at latitude 43.6314 and longitude -70.286 in Cumberland County. The formal boundaries for the City of South Portland (see map below) encompass a land area of 12.04 sq. miles and a water area of 1.97 sq. miles. Cumberland County is in the Eastern time zone (GMT -5). The elevation is 23 feet.

The City of South Portland (GNIS ID: 582738) has a C5 Census Class Code which indicates an active incorporated place that is independent of any county subdivision and serves as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Beneath the boundary map are tables with South Portland population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2016.

Neighborhood Data

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City of South Portland, ME Boundary Map

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South Portland, ME Data & Demographics (As of July 1, 2016)


Total Population 25,583
Population in Households 24,947
Population in Familes 17,784
Population in Group Qrtrs 636
Population Density1 2,124
Diversity Index2 23


Total Households 11,162
Average Household Size 2.23
Family Households 6,268
Average Family Size 3


Total Housing Units 11,826 (100%)
Owner Occupied HU 6,442 (54.5%)
Renter Occupied HU 4,720 (39.9%)
Vacant Housing Units 664 ( 5.6%)
Median Home Value $233,746
Average Home Value $268,244


Median Household Income $55,892
Average Household Income $71,995
Per Capita Income $31,826
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.37% 0.44%
Households 0.41% 0.48%
Families 0.18% 0.34%
Median Household Income   1.78%
Per Capita Income   1.7%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

South Portland, ME - Peer Comparisons by Rank and Percentile

The table below compares South Portland to the other 130 incorporated cities, towns and CDPs in Maine by rank and percentile using July 1, 2016 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 4 98th
Population Density1 # 2 99th
Diversity Index2 # 6 96th
Median Household Income # 29 78th
Per Capita Income # 26 81st

Additional comparisons and rankings can be made with a VERY EASY TO USE Maine Census Data Comparison Tool.

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