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.

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

White

Other race

Two or more races

Asian

Black or African American

Native Hawaiian or Pacific Islander

Native American

Race	Population	Percentage (of total)
White	15,988	49.13%
Other race	4,229	12.99%
Two or more races	4,125	12.67%
Asian	3,921	12.05%
Black or African American	3,555	10.92%
Native Hawaiian or Pacific Islander	545	1.67%
Native American	182	0.56%

Des Moines Marital Status

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