| Place Name | Westfield |
| Place Type | City |
| ZIP Code(s) | 01085 |
| County | Hampden County |
| Area Code(s) | 413 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 41,162 |
| Population Growth Rate (2010-19) | -0.63% |
| Majority Ethnicity | White 85.06% |
| Metro/Micro Stats Area | Springfield, MA |
| US Congressional District(s) | Massachusetts 1st |
| State House Districts | 4th Hampden |
| State Senate Districts | Second Hampden and Hampshire |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 85.06% |
| African American | 1.72% |
| Hispanic | 0.03% |
| Asian | 3.84% |
| Native American | 0.12% |
| Hawaiin/Pacific Islander | 9.23% |