South Prairie, WA Profile: Facts, Map & Data


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South Prairie, Washington - Basic Facts

The Town of South Prairie had a population of 465 as of July 1, 2016. South Prairie ranks in the lower quartile for Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in Washington. See peer rankings below.

The primary coordinate point for South Prairie is located at latitude 47.1354 and longitude -122.0966 in Pierce County. The formal boundaries for the Town of South Prairie (see map below) encompass a land area of 0.39 sq. miles and a water area of 0.01 sq. miles. Pierce County is in the Pacific time zone (GMT -8). The elevation is 433 feet.

The Town of South Prairie (GNIS ID: 2413310) has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

Washington is one of 20 states where Census County Divisions (CCDs) are used for statistical tracking of subdivisions within each county. The Town of South Prairie is located within Buckley Division of Pierce County.

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

Alternate Unofficial Names for South Prairie: Cascade Junction.

Neighborhood Data

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Town of South Prairie, WA Boundary Map

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Boundary Maps: Buckley Division | Pierce County | Washington Counties

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South Prairie, WA Data & Demographics (As of July 1, 2016)


Total Population 465
Population in Households 465
Population in Familes 395
Population in Group Qrtrs 0
Population Density1 1,200
Diversity Index2 23


Total Households 177
Average Household Size 2.63
Family Households 129
Average Family Size 3


Total Housing Units 187 (100%)
Owner Occupied HU 156 (83.4%)
Renter Occupied HU 22 (11.8%)
Vacant Housing Units 10 ( 5.3%)
Median Home Value $278,947
Average Home Value $393,910


Median Household Income $68,757
Average Household Income $91,273
Per Capita Income $33,027
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 1.11% 1.26%
Households 1.03% 1.32%
Families 1.86% 1.21%
Median Household Income   3.3%
Per Capita Income   2.47%
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 Prairie, WA - Peer Comparisons by Rank and Percentile

The table below compares South Prairie to the other 627 incorporated cities, towns and CDPs in Washington 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 # 477 24th
Population Density1 # 250 60th
Diversity Index2 # 501 20th
Median Household Income # 169 73rd
Per Capita Income # 175 72nd

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

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