| Place Name | Billerica |
| Place Type | Town |
| ZIP Code(s) | 01821 |
| County | Middlesex County |
| Area Code(s) | 351,978 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 41,995 |
| Majority Ethnicity | White 81.91% |
| Metro/Micro Stats Area | Boston-Cambridge-Newton, MA-NH |
| US Congressional District(s) | Massachusetts 6th |
| State House Districts | 22nd Middlesex |
| State Senate Districts | Fourth Middlesex |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 81.91% |
| African American | 6.31% |
| Hispanic | 0% |
| Asian | 7.33% |
| Native American | 0.11% |
| Hawaiin/Pacific Islander | 4.35% |