| Place Name | Arlington |
| Place Type | City |
| ZIP Code(s) | 98223 |
| GEOID | 5302585 |
| County | Snohomish County |
| Area Code(s) | 360 |
| Timezone | Pacific Standard Time (PST) |
| Population (2021) | 19,832 |
| Population Growth Rate (2010-19) | 10.83% |
| Majority Ethnicity | White 77.51% |
| Metro/Micro Stats Area | Seattle-Tacoma-Bellevue, WA |
| US Congressional District(s) | Washington 2nd |
| State House Districts | 39 |
| State Senate Districts | 39 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 77.51% |
| African American | 1.61% |
| Hispanic | 0.7% |
| Asian | 5.63% |
| Native American | 0.46% |
| Hawaiin/Pacific Islander | 14.09% |