South Prairie Flag

South Prairie

County:
Pierce County
County Seat:
No
Area (mi²):
0.383
State:
Washington

South Prairie is a town located in Pierce County, Washington. South Prairie has a 2026 population of 364. South Prairie is currently declining at a rate of -0.27% annually and its population has decreased by -2.41% since the most recent census, which recorded a population of 373 in 2020.

The median household income in South Prairie is $117,250 with a poverty rate of 2.91%. The median age in South Prairie is 38.5 years: 38.4 years for males, and 38.7 years for females. For every 100 females there are 128.9 males.

364
Total Population
950
Density (mi²)
-1 -0.27%
Growth

South Prairie Population

South Prairie Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
2026364-1-0.27%
2025365-2-0.54%
202436720.55%
2023365-3-0.82%
2022368-3-0.81%
2021371-2-0.54%
202037300%
2019443-2-0.45%
201844510.23%
201744440.91%
201644061.38%
201543420.46%
201443220.47%
201343000%
201243010.23%
2011429-5-1.15%
201042700%

Median Age

Overall: 38.5 years
Female: 38.7 years
Male: 38.4 years

South Prairie Adults

There are 233 adults, (45 of whom are seniors) in South Prairie.

Sex Ratio

Female: 135 (43.7%)
Male: 174 (56.3%)

Demographics

The racial composition of South Prairie includes 80.91% White, 4.85% other race, and smaller percentages for Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White25080.91%
Two or more races3110.03%
Other race154.85%
Asian82.59%
Native Hawaiian or Pacific Islander51.62%
Race
Population ↓
Percentage (of total)
Other race154.85%
White113.56%
Two or more races103.24%
Race
Population ↓
Percentage (of total)
White23977.35%
Two or more races216.8%
Asian82.59%
Native Hawaiian or Pacific Islander51.62%

South Prairie Marital Status

Economics and Income Statistics

South Prairie 's average per capita income is $65,625. Household income levels show a median of $117,250. The poverty rate stands at 2.91%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median ↓
Mean
Married Families$134,250-
Families$128,125$122,415
Households$117,250$123,146
Non Families$79,688$69,500

$65,625

Average Income

$117,250

Median Household Income

2.91%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)