Des Moines Flag

Des Moines

County:
King County
County Seat:
No
Area (mi²):
6.414
State:
Washington

Des Moines is a city located in King County, Washington. Des Moines has a 2025 population of 31,388. Des Moines is currently declining at a rate of -0.95% annually and its population has decreased by -4.56% since the most recent census, which recorded a population of 32,887 in 2020.

The average household income in Des Moines is $111,209 with a poverty rate of 10.69%.The median age in Des Moines is 37.5 years: 38.8 years for males, and 36.3 years for females.

31.4K
Total Population
4,894
Density (mi²)
-300 -0.95%
Growth

Des Moines Population

Des Moines Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Des Moines includes 49.13% White, 12.99% other race, 12.05% Asian, 10.92% Black or African American, and smaller percentages for Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White15,98849.13%
Other race4,22912.99%
Two or more races4,12512.67%
Asian3,92112.05%
Black or African American3,55510.92%
Native Hawaiian or Pacific Islander5451.67%
Native American1820.56%

Des Moines Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Des Moines' average per capita income is $54,972. Household income levels show a median of $89,787. The poverty rate stands at 10.69%.

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$133,116-
Families$117,543$127,057
Households$89,787$111,209
Non Families$55,214$78,465

$54,972

Average Income

$89,787

Median Household Income

10.69%

Poverty Rate

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)