Arlington, Washington Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Arlington, Washington is 20,599 as of the 2023 American Community Survey, making it the 73rd-largest city in Washington. The median household income is $84,919, the median home value is $492,600, and the median age is 37.1.
The population has grown 22.0% since 2010 (18,002 → 21,959).
20,599
Population
2066
People / sq mi
$84,919
Median Income
$492,600
Median Home Value
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Arlington covers 10.0 sq mi of land at 2066 people per square mile.
About Arlington, WA
Educational attainment is the headline number in Arlington: 20.3% of adults 25 and older have a four-year degree. With 20,599 residents, Arlington is a city in Washington.
Median household income is $84,919, above the US median of $78,538. The poverty rate is 7.0%, below the national 12.4%. Home values run above average at $492,600, with typical rent around $1,764.
College attainment is 20.3%, below the national 35.0%. About 11.1% of the workforce is home-based, below the national 14.0%, and the average commute runs about 30 minutes each way.
Arlington city Population History (2010-2024)
The city of Arlington city had a population of 18,002 in 2010 and 21,959 in 2024, a 22.0% growth over 14 years. The peak was 21,959 in 2024. Average annual growth rate: 1.44%.
21,959
Population (2024)
18,002
Population (2010)
21,959
Peak (2024)
1.44%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 18,002 |
| 2011 | 18,057 |
| 2012 | 18,292 |
| 2013 | 18,612 |
| 2014 | 18,755 |
| 2015 | 18,868 |
| 2016 | 19,080 |
| 2017 | 19,232 |
| 2018 | 19,764 |
| 2019 | 20,523 |
| 2020 | 20,045 |
| 2021 | 20,786 |
| 2022 | 21,227 |
| 2023 | 21,416 |
| 2024 | 21,959 |
Race & Ethnicity
| White | 75.6% |
| Black or African American | 1.3% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.0% |
| Two or More Races | 0.2% |
Economy & Income
$84,919
Median Household Income
$43,023
Per Capita Income
7.0%
Poverty Rate
2.3%
Unemployment Rate
Housing
$492,600
Median Home Value
$1,764
Median Rent
63.4%
Owner-Occupied
Education
90.9%
High School+
20.3%
Bachelor's+
Commute
0.8%
Drive Alone
73.7%
Public Transit
11.1%
Work From Home
30.4 min
Avg Commute
Community Profile
31.1%
Foreign Born
84.3%
Non-English at Home
12.7%
Veterans
14.5%
With Disability
93.2%
Health Insurance
97.0%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 19.1% |
| Manufacturing | 16.4% |
| Education, Health Care & Social Services | 10.8% |
| Construction | 10.5% |
| Finance, Insurance & Real Estate | 8.0% |
| Retail Trade | 6.2% |
| Public Administration | 4.5% |
| Information | 4.5% |
| Arts, Entertainment & Food Services | 3.7% |
| Agriculture & Mining | 1.2% |
| Transportation & Warehousing | 1.1% |
Largest cities in Washington
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Frequently Asked Questions
Arlington, Washington has a population of 20,599 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 73rd-largest city in Washington.
The median household income in Arlington, Washington is $84,919, with 7.0% of residents living below the federal poverty level.
The median home value in Arlington, Washington is $492,600, with median monthly rent at $1,764 and a homeownership rate of 63.4%.
The median age in Arlington, Washington is 37.1 years. The population is 50.0% male and 50.0% female.
The population has grown 22.0% since 2010 (18,002 → 21,959).
Arlington city, WA Climate
Arlington city, WA has an average annual temperature of 10.3°C (51°F) and receives about 1173 mm of precipitation per year. The warmest month is August and the coldest is January. Figures are 1970–2000 climate normals.
10.3°C
Avg Temp
1173
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 4° / 39° | 146 mm |
| February | 5° / 42° | 107 mm |
| March | 7° / 45° | 114 mm |
| April | 9° / 49° | 97 mm |
| May | 12° / 54° | 75 mm |
| June | 15° / 59° | 64 mm |
| July | 17° / 63° | 39 mm |
| August | 18° / 64° | 40 mm |
| September | 15° / 59° | 69 mm |
| October | 11° / 51° | 103 mm |
| November | 6° / 44° | 162 mm |
| December | 4° / 39° | 157 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Arlington city, WA
The most comfortable months to visit Arlington city, WA are typically August, July and June, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 24°C high). The coldest is January (near 1°C low). November is usually the wettest month.
Where to stay near Arlington
Visiting or relocating to Arlington, WA? Compare hotels and short-term rentals across the metro — live availability and prices.
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Population, race, income, age, and trends across Washington
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.