
Hillside
- County:
- Ulster County
- County Seat:
- No
- Area (mi²):
- 0.819
- State:
- New York
Hillside is a CDP located in Ulster County, New York. Hillside has a 2025 population of 723. Hillside is currently declining at a rate of -1.5% annually and its population has decreased by -2.56% since the most recent census, which recorded a population of 742 in 2020.
The average household income in Hillside is $156,651 with a poverty rate of 3.49%. The median age in Hillside is 48.8 years: 47.9 years for males, and 49.5 years for females.