| Place Name | Onancock |
| Place Type | Town |
| ZIP Code(s) | 23417 |
| County | Accomack County |
| Area Code(s) | 757 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 1,501 |
| Population Growth Rate (2010-19) | -7.44% |
| Majority Ethnicity | White 52.79% |
| US Congressional District(s) | Virginia 2nd |
| House of Delegates Districts | 100 |
| State Senate Districts | 6 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 52.79% |
| African American | 42.19% |
| Hispanic | 0.08% |
| Asian | 0.08% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 4.86% |