Anderson Island, Washington Demographics & Population 2026

Population Overview

Anderson Island is a small community located in Washington, within Pierce County. The total population is 1,448. It ranks as the 356th most populous out of 628 Census-designated places in Washington.

Age Demographics

The median age in Anderson Island is 61.6 years. This is 61% higher than the state median of 38.3 years. 10.2% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in Anderson Island is $80,282. This is 18% lower than the state median of $98,141. It is also about the same as the national median of $80,734. The poverty rate stands at 23.1%. This is 133% higher than the state poverty rate of 9.9%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The survey records no unemployed residents in Anderson Island, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $546,300. Housing costs are 3% lower than the state median of $564,600. The home-value-to-income ratio of 6.8x suggests that housing affordability is a significant concern for many residents. 96.6% of occupied housing units are owner-occupied. This homeownership rate is 51% higher than the state average of 63.8%.

Race & Ethnicity

The largest racial or ethnic group in Anderson Island is White (non-Hispanic), making up 80.0% of the population. Hispanic or Latino residents account for 3.8%. The Black or African American population (0.9%) is well below the state average of 3.9%. The Hispanic or Latino population (3.8%) is well below the state average of 14.4%.

Education

44.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 11% higher than the state rate of 39.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. No surveyed resident aged 25 or older reported leaving school before earning a high school diploma, though a rate of exactly 100% reflects the limits of a small sample.

Data Sources & Methodology

All demographic data for Anderson 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.