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 2026 population of 1,938. Rock Island is currently growing at a rate of 5.9% annually and its population has increased by 50.35% since the most recent census, which recorded a population of 1,289 in 2020.

The median household income in Rock Island is $69,861 with a poverty rate of 10.32%. The median age in Rock Island is 37.8 years: 40.4 years for males, and 35.5 years for females. For every 100 females there are 85.6 males.

1.9K
Total Population
1,719
Density (mi²)
108 5.9%
Growth

Rock Island Population

Rock Island Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20261,9381085.9%
20251,8301086.27%
20241,722986.03%
20231,62415410.48%
20221,4701128.25%
20211,358695.35%
20201,289141.1%
20191,255776.54%
20181,178292.52%
20171,149595.41%
20161,090454.31%
20151,045191.85%
20141,02680.79%
20131,01850.49%
20121,01390.9%
20111,00421627.41%
20101,00710.1%

Median Age

Overall: 37.8 years
Female: 35.5 years
Male: 40.4 years

Rock Island Adults

There are 899 adults, (188 of whom are seniors) in Rock Island.

Sex Ratio

Female: 674 (53.9%)
Male: 577 (46.1%)

Demographics

The racial composition of Rock Island includes 45.96% White, 39.65% other race, and smaller percentages for Black or African American, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White57545.96%
Other race49639.65%
Two or more races15512.39%
Black or African American211.68%
Native American40.32%
Race
Population ↓
Percentage (of total)
Other race49639.65%
Two or more races13110.47%
White443.52%
Race
Population ↓
Percentage (of total)
White53142.45%
Two or more races241.92%
Black or African American211.68%
Native American40.32%

Rock Island Marital Status

Economics and Income Statistics

Rock Island 's average per capita income is $38,205. Household income levels show a median of $69,861. The poverty rate stands at 10.32%.

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$82,964-
Families$75,833$75,502
Households$69,861$73,245
Non Families$40,947$46,198

$38,205

Average Income

$69,861

Median Household Income

10.32%

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)