Closter
- County:
- Bergen County
- County Seat:
- No
- Area (mi²):
- 3.16
- State:
- New Jersey
Closter is a borough located in Bergen County, New Jersey. Closter has a 2026 population of 8,730. Closter is currently growing at a rate of 1.11% annually and its population has increased by 1.8% since the most recent census, which recorded a population of 8,576 in 2020.