
New Gretna
- County:
- Burlington County
- County Seat:
- No
- Area (mi²):
- 0.846
- State:
- New Jersey
New Gretna is a CDP located in Burlington County, New Jersey. New Gretna has a 2025 population of 289. New Gretna is currently growing at a rate of 7.04% annually but its population has decreased by -19.72% since the most recent census, which recorded a population of 360 in 2020.
The average household income in New Gretna is $92,677 with a poverty rate of 10.84%. The median age in New Gretna is 39.3 years: 41.4 years for males, and 36.4 years for females.