| Place Name | Petersham (town) |
| Place Type | Town |
| County | Worcester County |
| Area Code(s) | 351,978 |
| Timezone | Eastern Standard Time (EST) |
| Population (2021) | 1,141 |
| Majority Ethnicity | White 94.46% |
| Metro/Micro Stats Area | Worcester, MA-CT |
| US Congressional District(s) | Massachusetts 2nd |
| State House Districts | 2nd Franklin |
| State Senate Districts | Worcester, Hampden, Hampshire and Middlesex |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 94.46% |
| African American | 0.45% |
| Hispanic | 0% |
| Asian | 1% |
| Native American | 0.27% |
| Hawaiin/Pacific Islander | 3.81% |