
Poestenkill
- County:
- Rensselaer County
- County Seat:
- No
- Area (mi²):
- 5.876
- State:
- New York
Poestenkill is a CDP located in Rensselaer County, New York. Poestenkill has a 2025 population of 677. Poestenkill is currently declining at a rate of -3.7% annually and its population has decreased by -16.83% since the most recent census, which recorded a population of 814 in 2020.
The average household income in Poestenkill is $123,815 with a poverty rate of 11.23%. The median age in Poestenkill is 50.8 years: 50.6 years for males, and 50.9 years for females.