
Hainesburg
- County:
- Warren County
- County Seat:
- No
- Area (mi²):
- 1.503
- State:
- New Jersey
Hainesburg is a CDP located in Warren County, New Jersey. Hainesburg has a 2025 population of 321. Hainesburg is currently growing at a rate of 7% annually and its population has increased by 174.36% since the most recent census, which recorded a population of 117 in 2020.
The average household income in Hainesburg is $103,891 with a poverty rate of 0%. The median age in Hainesburg is 44.2 years: 44.4 years for males, and 43.8 years for females.