Arlington, Washington Demographics & Population 2026
During the 2020–2024 ACS period, Arlington, Washington had a total population of 21,095, the 71st largest city in Washington, with a median household income of $88,231, which is 10% lower than the state average. The poverty rate is 12.7%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Arlington Quick Facts
How Arlington 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 | 20,599 | 21,095 | +2.4% |
| Median household income | $84,919 | $88,231 | +3.9% |
| Median home value | $492,600 | $538,800 | +9.4% |
How Arlington 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+)
Arlington Rankings in Washington
Explore Washington Rankings
Other Cities in Snohomish County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Everett | 111,845 | $83,512 | 12.9% | $565,300 |
| Marysville | 73,002 | $103,974 | 8.1% | $567,900 |
| Edmonds | 42,735 | $122,449 | 3.8% | $890,100 |
| Lake Stevens | 40,253 | $122,336 | 5.2% | $635,600 |
| Lynnwood | 40,110 | $77,704 | 14.1% | $686,900 |
| Mill Creek East | 25,453 | $192,937 | 4.1% | $905,400 |
| Eastmont | 23,721 | $138,912 | 6.3% | $784,000 |
| North Lynnwood | 23,339 | $101,088 | 7.2% | $616,400 |
| Mountlake Terrace | 23,104 | $107,687 | 7.0% | $667,300 |
| Martha Lake | 22,634 | $124,494 | 8.3% | $785,400 |
Cities Similar to Arlington
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Tukwila | 21,451 | $78,381 | $489,000 | 25.3% | 13.1% |
| Five Corners | 21,194 | $106,192 | $459,600 | 25.7% | 8.6% |
| Hazel Dell | 23,237 | $86,305 | $455,500 | 27.2% | 9.8% |
| Silverdale | 20,685 | $105,483 | $555,300 | 36.3% | 6.2% |
| Battle Ground | 21,886 | $104,977 | $485,100 | 26.7% | 5.9% |
Population Overview
Arlington is a small city located in Washington, within Snohomish County. The total population is 21,095. It ranks as the 71st most populous out of 628 Census-designated places in Washington.
Age Demographics
The median age in Arlington is 36.6 years. This is 4% lower than the state median of 38.3 years.
Economy, Income & Housing
The median household income in Arlington is $88,231. This is 10% lower than the state median of $98,141. It is also 9% higher than the national median of $80,734. The poverty rate stands at 12.7%. This is 28% higher than the state poverty rate of 9.9%. The unemployment rate is 4.2%. This is 17% lower than the state rate of 5.1%. The median home value is $538,800. Housing costs are 5% lower than the state median of $564,600. The home-value-to-income ratio of 6.1x suggests that housing affordability is a significant concern for many residents. 62.2% of occupied housing units are owner-occupied. This homeownership rate is 2% lower than the state average of 63.8%.
Race & Ethnicity
The largest racial or ethnic group in Arlington is White (non-Hispanic), making up 71.4% of the population. Hispanic or Latino residents account for 16.0%. The Black or African American population (1.4%) is well below the state average of 3.9%.
Education
20.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 47% 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 91.0%.
Data Sources & Methodology
All demographic data for Arlington, 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.
Free data download: Get all Washington city and county demographics as CSV. Download Cities CSV | Download Counties CSV
Frequently Asked Questions
What is the population of Arlington, Washington?
Arlington, Washington has a population of 21,095 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Arlington, WA?
The median household income in Arlington is $88,231, which is 9% higher than the national median of $80,734.
What is the poverty rate in Arlington, WA?
The poverty rate in Arlington is 12.7%. This means approximately 2,654 residents live below the federal poverty line.
What is the racial makeup of Arlington, Washington?
Arlington's population is 71.4% White, 1.4% Black, 16.0% Hispanic/Latino, and 5.4% Asian.
What is the median home value in Arlington, WA?
The median home value in Arlington is $538,800. The home-value-to-income ratio is 6.1x.
How educated is Arlington, Washington?
20.8% of adults (25+) in Arlington hold a bachelor's degree or higher, and 6.4% hold a graduate or professional degree.