Rock Island Flag

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.

1.8K
Total Population
1,623
Density (mi²)
108 6.28%
Growth

Rock Island Population

Rock Island Population

Data after 2023 is projected based on recent change

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 and multiracial populations.

Population by Race

White (50.9%)

Other race (36.4%)

Two or more races (10.3%)

Black or African American (2.0%)

Native American (0.4%)

Race
Population
Percentage (of total)
White58150.88%
Other race41636.43%
Two or more races11710.25%
Black or African American232.01%
Native American50.44%

Rock Island Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

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

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)