| Place Name | Arlington (town) |
| Place Type | Town |
| County | Middlesex County |
| Area Code(s) | 339,781 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 46,045 |
| Majority Ethnicity | White 77.34% |
| Metro/Micro Stats Area | Boston-Cambridge-Newton, MA-NH |
| US Congressional District(s) | Massachusetts 5th |
| State House Districts | 23rd Middlesex,24th Middlesex |
| State Senate Districts | Fourth Middlesex |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 77.34% |
| African American | 3.42% |
| Hispanic | 0.08% |
| Asian | 14% |
| Native American | 0.02% |
| Hawaiin/Pacific Islander | 5.14% |