| Place Name | Williamstown |
| Place Type | Town |
| ZIP Code(s) | 13493 |
| County | Oswego County |
| Area Code(s) | 315,680 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 1,619 |
| Majority Ethnicity | White 99.06% |
| Metro/Micro Stats Area | Syracuse, NY |
| US Congressional District(s) | New York 22nd |
| State Assembly Districts | 120 |
| State Senate Districts | 48 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 99.06% |
| African American | 0% |
| Hispanic | 0.13% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.82% |