Rock Island, Washington Demographics & Population 2026
During the 2020–2024 ACS period, Rock Island, Washington had a total population of 1,251, the 370th largest city in Washington, with a median household income of $69,861, which is 29% lower than the state average. The poverty rate is 10.3%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Only 8.9% of adults have a bachelor's degree, well below the national average of 35.7%.
Rock Island Quick Facts
How Rock Island Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 1,142 | 1,251 | +9.5% |
| Median household income | $55,114 | $69,861 | +26.8% |
| Median home value | $255,500 | $273,500 | +7.0% |
How Rock Island Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 56 | National average: 61
Education
Educational Attainment (Adults 25+)
Rock Island Rankings in Washington
Explore Washington Rankings
Other Cities in Douglas County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| East Wenatchee | 14,199 | $77,558 | 8.0% | $429,200 |
| Bridgeport | 1,792 | $52,375 | 11.9% | $177,000 |
| Waterville | 1,250 | $78,589 | 7.8% | $262,000 |
| Mansfield | 298 | $61,458 | 5.0% | $212,500 |
Cities Similar to Rock Island
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Waterville | 1,250 | $78,589 | $262,000 | 9.8% | 7.8% |
| South Wenatchee | 1,226 | $63,929 | $249,100 | 9.9% | 8.8% |
| Entiat | 1,284 | $76,111 | $364,500 | 22.6% | 4.9% |
| Point Roberts | 1,288 | $78,125 | $483,900 | 44.7% | 14.9% |
| Kittitas | 1,221 | $80,278 | $316,700 | 22.9% | 11.6% |
Population Overview
Rock Island is a small community located in Washington, within Douglas County. The total population is 1,251. It ranks as the 370th most populous out of 628 Census-designated places in Washington.
Age Demographics
The median age in Rock Island is 37.8 years. This is 1% lower than the state median of 38.3 years. With 28.1% of the population under 18, Rock Island has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The median household income in Rock Island is $69,861. This is 29% lower than the state median of $98,141. It is also 13% lower than the national median of $80,734. The poverty rate stands at 10.3%. This is 4% higher than the state poverty rate of 9.9%. The unemployment rate is 2.6%. This is 48% lower than the state rate of 5.1%. The median home value is $273,500. Housing costs are 52% lower than the state median of $564,600. The home-value-to-income ratio is 3.9x. 83.3% of occupied housing units are owner-occupied. This homeownership rate is 31% higher than the state average of 63.8%.
Race & Ethnicity
The largest racial or ethnic group in Rock Island is Hispanic or Latino, making up 53.6% of the population. White (non-Hispanic) residents account for 42.4%. The Black or African American population (1.7%) is well below the state average of 3.9%. The Hispanic or Latino population is significantly higher than the state average (53.6% vs 14.4%).
Education
8.9% of residents aged 25 and older hold a bachelor's degree or higher. This is among the lowest rates in the state, which may correlate with employment and income patterns. This is 78% lower than the state rate of 39.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 69.6%.
Data Sources & Methodology
All demographic data for Rock Island, Washington is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Washington state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 628 Census-designated places in Washington. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Rock Island, Washington?
Rock Island, Washington has a population of 1,251 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Rock Island, WA?
The median household income in Rock Island is $69,861, which is 13% lower than the national median of $80,734.
What is the poverty rate in Rock Island, WA?
The poverty rate in Rock Island is 10.3%. This means approximately 128 residents live below the federal poverty line.
What is the racial makeup of Rock Island, Washington?
Rock Island's population is 42.4% White, 1.7% Black, 53.6% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Rock Island, WA?
The median home value in Rock Island is $273,500. The home-value-to-income ratio is 3.9x.
How educated is Rock Island, Washington?
8.9% of adults (25+) in Rock Island hold a bachelor's degree or higher, and 3.0% hold a graduate or professional degree.