Arlington city, Washington Demographics & Population 2026

Population Overview

Arlington city is a small city located in Washington. The total population is 20,599. It ranks as the 73rd most populous out of 631 cities and towns in Washington.

Age Demographics

The median age in Arlington city is 37.1 years. This is 3% lower than the state median of 38.2 years.

Economy, Income & Housing

The median household income in Arlington city is $84,919. This is 11% lower than the state median of $94,952. Compared to the national median of $78,538, household income here is 8% higher. The poverty rate stands at 10.9%. This is 10% higher than the state poverty rate of 9.9%. The unemployment rate is 3.6%. This is 27% lower than the state rate of 5.0%. The median home value is $492,600. Housing costs are 5% lower than the state median of $519,800. The home-value-to-income ratio is 5.8x. 63.4% of occupied housing units are owner-occupied.

Race & Ethnicity

The largest racial or ethnic group in Arlington city is White (non-Hispanic), making up 72.8% of the population. Hispanic or Latino residents account for 15.1%. The Black or African American population (1.3%) is well below the state average of 3.8%.

Education

20.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 48% lower than the state rate of 38.8%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 90.9%.

Data Sources & Methodology

All demographic data for Arlington city, Washington is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Washington state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 631 Census-designated places in Washington. For official data, visit data.census.gov.