| Place Name | Ayer (town) |
| Place Type | Town |
| ZIP Code(s) | 01432 01434 01450 01460 |
| County | Middlesex County |
| Area Code(s) | 351,978 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 8,396 |
| Majority Ethnicity | White 82.58% |
| Metro/Micro Stats Area | Boston-Cambridge-Newton, MA-NH |
| US Congressional District(s) | Massachusetts 3rd |
| State House Districts | 1st Middlesex,37th Middlesex |
| State Senate Districts | Middlesex and Worcester |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 82.58% |
| African American | 2.49% |
| Hispanic | 0.14% |
| Asian | 4.88% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 9.9% |