| Place Name | Siasconset |
| Place Type | Census Designated Place |
| ZIP Code(s) | 02554 |
| County | Nantucket County |
| Area Code(s) | 508,774 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 153 |
| Population Growth Rate (2010-19) | 146.34% |
| Majority Ethnicity | White 67.27% |
| US Congressional District(s) | Massachusetts 9th |
| State House Districts | Barnstable, Dukes & Nantucket |
| State Senate Districts | Cape and Islands |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 67.27% |
| African American | 30.91% |
| Hispanic | 0% |
| Asian | 1.82% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |