| Place Name | Poestenkill |
| Place Type | Census Designated Place |
| ZIP Code(s) | 12140 |
| County | Rensselaer County |
| Area Code(s) | 518,838 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 1,177 |
| Population Growth Rate (2010-19) | -3.86% |
| Majority Ethnicity | White 96.22% |
| Metro/Micro Stats Area | Albany-Schenectady-Troy, NY |
| US Congressional District(s) | New York 19th |
| State Assembly Districts | 107 |
| State Senate Districts | 43 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 96.22% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 3.78% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |