Hamburg
- County:
- Sussex County
- County Seat:
- No
- Area (mi²):
- 1.145
- State:
- New Jersey
Hamburg is a borough located in Sussex County, New Jersey. Hamburg has a 2026 population of 3,351. Hamburg is currently growing at a rate of 0.63% annually and its population has increased by 2.85% since the most recent census, which recorded a population of 3,258 in 2020.