City · Washington
Arlington, Washington
Arlington, city, in Snohomish County, Washington. Arlington had 22,031 residents on July 1, 2025 by the Census Bureau's estimate, up 10.6% since 2020; the 2020 Census counted 19,868 and the ACS 2020-2024 5-year estimates put it at 21,095 (±38). GEOID 5302585.
Residents, July 2025 estimate
22,031
Census Bureau estimate (no margin published)
2020 Census count: 19,868 · ACS 2020-2024: 21,095 ±38
Median household income
$88,231
±$8,852 (90% margin)
Washington: $98,141
Median home value
$538,800
±$24,649 (90% margin)
Washington: $564,600
Median gross rent
$1,905
±$115 (90% margin)
Washington: $1,760
Where is Arlington and what county is it in?
Arlington is a city in Snohomish County, Washington. It covers 10.0 square miles of land, 1,993 residents per square mile in 2020.
Arlington is in the Seattle-Tacoma-Bellevue, WA metropolitan statistical area, which takes in 3 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Arlington, and is it growing?
The Census Bureau estimates that 22,031 people lived in Arlington on July 1, 2025, up 10.6% since 2020, faster than Washington (+3.8%). The 2020 Census counted 19,868 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 21,095 (±38).
| Measure | Arlington | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 21,095 ±38 | 844,430 | +1,612 |
| Households | 7,695 ±408 | 316,212 | no clear change |
| Average household size | 2.73 ±0.14 | 2.64 | no clear change |
| Housing units | 8,230 ±453 | 331,530 | no clear change |
Arlington's population since 2000
From 11,713 in 2000 to 22,031 in 2025: up 88.1%. The 2000, 2010 and 2020 figures are census counts, each for Arlington as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Arlington?
The median resident of Arlington is 36.6 years old; 25.1% are under 18 and 13.8% are 65 or older. The largest group is non-Hispanic white residents at 71.4%, then Hispanic or Latino residents (of any race) at 16.0%. 11.0% of residents were born outside the United States.
| Measure | Arlington | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 36.6 ±1.7 | 38.6 | no clear change |
| Under 18 years | 25.1% ±2.6 pts | 22.1% | – |
| 65 years and over | 13.8% ±1.8 pts | 14.8% | – |
| Male | 50.5% ±2.1 pts | 50.4% | – |
| Hispanic or Latino (any race) | 16.0% ±3.5 pts | 12.1% | +6.4 pts |
| White alone, not Hispanic | 71.4% ±4.2 pts | 62.0% | −6.8 pts |
| Black or African American alone, not Hispanic | 1.4% ±0.9 pts | 3.6% | no clear change |
| Asian alone, not Hispanic | 5.4% ±2.1 pts | 13.6% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.2% ±0.2 pts | 0.6% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.2% ±0.2 pts | 0.5% | – |
| Two or more races, not Hispanic | 4.9% ±1.7 pts | 6.9% | – |
| Some other race alone, not Hispanic | 0.6% ±0.5 pts | 0.7% | – |
| Born outside the United States | 11.0% ±3.0 pts | 19.3% | no clear change |
| Speak a language other than English at home (age 5+) | 16.2% ±3.5 pts | 24.4% | – |
| Civilian veterans (age 18+) | 12.4% ±1.8 pts | 6.9% | – |
| With a disability | 15.2% ±2.3 pts | 12.4% | – |
| No health insurance coverage | 6.6% ±2.6 pts | 6.2% | no clear change |
| High school graduate or higher (age 25+) | 91.0% ±2.6 pts | 93.1% | – |
| Bachelor's degree or higher (age 25+) | 20.8% ±2.7 pts | 38.2% | no clear change |
| Graduate or professional degree (age 25+) | 6.4% ±1.4 pts | 13.4% | – |
| Lived in the same house a year earlier | 81.2% ±3.7 pts | 87.3% | – |
| Moved from another state in the past year | 3.6% ±1.8 pts | 1.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Arlington earn?
Half of Arlington's 7,695 households earn less than $88,231 a year (±$8,852), against $111,246 in Snohomish County and $98,141 in Washington. In 2015-2019 it was $101,687 in 2024 dollars; the margins of error cannot tell the two periods apart. 12.7% of residents live below the poverty line.
| Measure | Arlington | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $88,231 ±$8,852 | $111,246 | no clear change |
| Mean household income | $117,107 ±$12,382 | $142,821 | – |
| Per capita income | $44,206 ±$4,836 | $54,628 | no clear change |
| People below the poverty line | 12.7% ±3.3 pts | 8.0% | +7.7 pts |
| Children under 18 below the poverty line | 17.6% ±7.8 pts | 9.2% | – |
| Households receiving SNAP | 16.0% ±3.3 pts | 8.8% | – |
| Households with a computer | 97.3% ±1.5 pts | 97.7% | – |
| Households with a broadband subscription | 91.7% ±2.9 pts | 94.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Arlington?
Owners occupy 62.2% of Arlington's occupied homes and renters 37.8%. The median owner-occupied home is valued at $538,800 by its owner (±$24,649). The median renter pays $1,905 a month including utilities, and 47.7% of renters pay 35% or more of their income on rent.
| Measure | Arlington | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $538,800 ±$24,649 | $696,000 | +$141,040 |
| Median gross rent | $1,905 ±$115 | $1,949 | +$255 |
| Renters paying 35% or more of income on rent | 47.7% ±7.2 pts | 41.9% | +10.7 pts |
| Median monthly owner costs, with a mortgage | $2,331 ±$101 | $2,748 | – |
| Owner-occupied homes | 62.2% ±3.9 pts | 68.2% | no clear change |
| Renter-occupied homes | 37.8% ±3.9 pts | 31.8% | – |
| Housing units | 8,230 ±453 | 331,530 | no clear change |
| Homeowner vacancy rate | 2.5% ±2.5 pts | 0.5% | – |
| Rental vacancy rate | 4.7% ±3.8 pts | 4.0% | – |
| Single-family detached homes | 60.8% ±3.8 pts | 63.9% | – |
| Mobile homes | 4.9% ±2.1 pts | 4.6% | – |
| Built 2020 or later | 2.2% ±1.1 pts | 2.6% | – |
| Built 2010 to 2019 | 6.6% ±1.6 pts | 12.2% | – |
| Built 1939 or earlier | 4.3% ±1.8 pts | 4.9% | – |
| Households with no vehicle | 5.9% ±2.0 pts | 4.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Arlington building?
Builders took permits for 74 new housing units in Arlington in 2025 (5 in single-family houses), 3.4 per 1,000 residents against 4.4 across Washington.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Arlington work and get to work?
74.2% of Arlington's workers drive alone and 11.9% work from home. The average trip to work takes 29.9 minutes. The unemployment rate in 2020-2024 averaged 4.2%.
| Measure | Arlington | Snohomish County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 63.7% ±3.1 pts | 67.3% | – |
| Unemployment rate | 4.2% ±1.6 pts | 4.5% | no clear change |
| Drove alone to work | 74.2% ±4.0 pts | 65.0% | – |
| Carpooled | 10.3% ±3.4 pts | 9.1% | – |
| Public transportation | 1.2% ±0.9 pts | 2.8% | – |
| Walked | 1.6% ±0.9 pts | 1.6% | – |
| Worked from home | 11.9% ±2.8 pts | 20.0% | +7.1 pts |
| Mean travel time to work | 29.9 min ±1.9 | 30.8 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Arlington?
5 census tracts lie mostly in Arlington, and 2 more reach into it (2020 census blocks). Their median household incomes run from $67,019 (Tract 535.09) to $126,495 (Tract 535.07).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 535.07Snohomish County | 6,059 | $126,495 |
| Tract 535.09Snohomish County | 4,701 | $67,019 |
| Tract 535.10Snohomish County | 3,789 | $92,791 |
| Tract 535.11Snohomish County | 3,849 | $79,828 |
| Tract 535.08Snohomish County | 3,337 | $100,260 |
| Tract 528.03Snohomish County | 5,575 | $110,208 |
| Tract 527.01Snohomish County | 1,992 | $116,149 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Arlington) · Census block assignment files
How does Arlington compare with other places in Washington?
By the Census Bureau's July 2025 estimates, Arlington is the 1,789th-most populous of the 19,476 U.S. incorporated places that have one and the 52nd-most populous of 281 in Washington.
Arlington ranks 219th of 387 places in Washington with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 52nd | 281 |
| Growth 2020-2025 (PEP) | 35th | 203 |
| Residents per square mile | 141st | 394 |
| Median household income | 219th | 387 |
| Per capita income | 201st | 393 |
| Median home value | 177th | 384 |
| Median gross rent | 107th | 351 |
| Poverty rate | 104th | 281 |
| Bachelor's degree or higher | 302nd | 382 |
| Median age | 273rd | 394 |
| Owner-occupied share | 273rd | 388 |
| Work from home | 220th | 307 |
| Travel time to work | 129th | 394 |
Arlington's figures with every place in Washington (CSV)
Every place in Washington, sortable · Compare Arlington with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Arlington?
6 of the 57 figures for Arlington on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Arlington are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' public schools in Arlington.