Cottage Lake

County:: King County
County Seat:: No
Area (mi²):: 22.736
State:: Washington

Cottage Lake is a CDP located in King County, Washington. Cottage Lake has a 2025 population of 23,418. Cottage Lake is currently growing at a rate of 0.27% annually and its population has increased by 0.77% since the most recent census, which recorded a population of 23,239 in 2020.

The average household income in Cottage Lake is $255,088 with a poverty rate of 3.1%. The median age in Cottage Lake is 44.2 years: 44 years for males, and 44.5 years for females.

Demographics

The racial composition of Cottage Lake includes 79.06% White, 8.88% Asian, and smaller percentages for other race, Native Hawaiian or Pacific Islander, Black or African American, Native American and multiracial populations.

Population by Race

White

Two or more races

Asian

Other race

Native Hawaiian or Pacific Islander

Black or African American

Native American

Race	Population	Percentage (of total)
White	18,318	79.06%
Two or more races	2,273	9.81%
Asian	2,058	8.88%
Other race	390	1.68%
Native Hawaiian or Pacific Islander	70	0.3%
Black or African American	53	0.23%
Native American	8	0.03%

Cottage Lake Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Cottage Lake's average per capita income is $102,134. Household income levels show a median of $197,331. The poverty rate stands at 3.1%.

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	$225,288	-
Families	$214,171	$271,023
Households	$197,331	$255,088
Non Families	$127,708	$146,995

$102,134

Average Income

$197,331

Median Household Income

3.1%

Poverty Rate