Belmar
- County:
- Monmouth County
- County Seat:
- No
- Area (mi²):
- 1.045
- State:
- New Jersey
Belmar is a borough located in Monmouth County, New Jersey. Belmar has a 2026 population of 5,846. Belmar is currently growing at a rate of 0.14% annually but its population has decreased by -0.76% since the most recent census, which recorded a population of 5,891 in 2020.