Neptune City
- County:
- Monmouth County
- County Seat:
- No
- Area (mi²):
- 0.896
- State:
- New Jersey
Neptune City is a borough located in Monmouth County, New Jersey. Neptune City has a 2026 population of 4,599. Neptune City is currently growing at a rate of 0.11% annually but its population has decreased by -0.22% since the most recent census, which recorded a population of 4,609 in 2020.