Arlington

County:: Snohomish County
County Seat:: No
Area (mi²):: 9.97
State:: Washington

Arlington is a city located in Snohomish County, Washington. Arlington has a 2025 population of 21,982. Arlington is currently growing at a rate of 1.8% annually and its population has increased by 9.68% since the most recent census, which recorded a population of 20,042 in 2020.

The average household income in Arlington is $112,741 with a poverty rate of 10.95%. The median age in Arlington is 37.1 years: 36.6 years for males, and 38.5 years for females.

Demographics

The racial composition of Arlington includes 75.64% White, 6.6% other race, 5.46% Asian, and smaller percentages for Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Other race

Asian

Black or African American

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	15,582	75.64%
Two or more races	2,089	10.14%
Other race	1,360	6.6%
Asian	1,125	5.46%
Black or African American	274	1.33%
Native American	112	0.54%
Native Hawaiian or Pacific Islander	57	0.28%

Arlington Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Arlington's average per capita income is $56,598. Household income levels show a median of $84,919. The poverty rate stands at 10.95%.

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	$134,357	-
Families	$107,143	$133,043
Households	$84,919	$112,741
Non Families	$52,832	$65,575

$56,598

Average Income

$84,919

Median Household Income

10.95%

Poverty Rate