Caldwell
- County:
- Essex County
- County Seat:
- No
- Area (mi²):
- 1.178
- State:
- New Jersey
Caldwell is a borough located in Essex County, New Jersey. Caldwell has a 2026 population of 9,326. Caldwell is currently growing at a rate of 4.19% annually and its population has increased by 3.93% since the most recent census, which recorded a population of 8,973 in 2020.