Mill Creek

County:: Snohomish County
County Seat:: No
Area (mi²):: 4.644
State:: Washington

Mill Creek is a city located in Snohomish County, Washington. Mill Creek has a 2025 population of 20,630. Mill Creek is currently declining at a rate of -0.27% annually and its population has decreased by -1.34% since the most recent census, which recorded a population of 20,910 in 2020.

The average household income in Mill Creek is $156,404 with a poverty rate of 4.89%.The median age in Mill Creek is 38.8 years: 37.9 years for males, and 39.6 years for females.

Demographics

The racial composition of Mill Creek includes 63.99% White, 20.57% Asian, 4.65% Black or African American, and smaller percentages for other race, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	13,340	63.99%
Asian	4,289	20.57%
Two or more races	1,630	7.82%
Black or African American	969	4.65%
Other race	487	2.34%
Native Hawaiian or Pacific Islander	84	0.4%
Native American	47	0.23%

Mill Creek Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Mill Creek's average per capita income is $82,976. Household income levels show a median of $121,578. The poverty rate stands at 4.89%.

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	$165,494	-
Families	$149,592	$189,349
Households	$121,578	$156,404
Non Families	$66,705	$88,741

$82,976

Average Income

$121,578

Median Household Income

4.89%

Poverty Rate