Cliffside Park
- County:
- Bergen County
- County Seat:
- No
- Area (mi²):
- 0.956
- State:
- New Jersey
Cliffside Park is a borough located in Bergen County, New Jersey. Cliffside Park has a 2026 population of 26,183. Cliffside Park is currently growing at a rate of 1.42% annually and its population has increased by 2.09% since the most recent census, which recorded a population of 25,646 in 2020.