| Place Name | Williamstown |
| Place Type | Census Designated Place |
| ZIP Code(s) | 01267 |
| County | Berkshire County |
| Area Code(s) | 413 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2022) | 3,787 |
| Population Growth Rate (2010-19) | -0.39% |
| Majority Ethnicity | White 79.78% |
| Metro/Micro Stats Area | Pittsfield, MA |
| US Congressional District(s) | Massachusetts 1st |
| State House Districts | 1st Berkshire |
| State Senate Districts | Berkshire, Hampshire, Franklin and Hampden |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 79.78% |
| African American | 4.65% |
| Hispanic | 0.25% |
| Asian | 9.16% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 6.17% |