Rock Island

County:: Douglas County
County Seat:: No
Area (mi²):: 1.127
State:: Washington

Rock Island is a city located in Douglas County, Washington. Rock Island has a 2025 population of 1,829. Rock Island is currently growing at a rate of 6.28% annually and its population has increased by 41.89% since the most recent census, which recorded a population of 1,289 in 2020.

The average household income in Rock Island is $64,666 with a poverty rate of 9.36%. The median age in Rock Island is 36.4 years: 39.5 years for males, and 35.1 years for females.

Demographics

The racial composition of Rock Island includes 50.88% White, 36.43% other race, and smaller percentages for Black or African American, Native American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Other race

Two or more races

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	581	50.88%
Other race	416	36.43%
Two or more races	117	10.25%
Black or African American	23	2.01%
Native American	5	0.44%
Asian	0	0%
Native Hawaiian or Pacific Islander	0	0%

Rock Island Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Rock Island's average per capita income is $34,922. Household income levels show a median of $55,114. The poverty rate stands at 9.36%.

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	$78,056	-
Families	$59,643	$69,829
Households	$55,114	$64,666
Non Families	$40,444	$44,851

$34,922

Average Income

$55,114

Median Household Income

9.36%

Poverty Rate