
Franklin
- County:
- Sussex County
- County Seat:
- No
- Area (mi²):
- 4.356
- State:
- New Jersey
Franklin borough is located in Sussex County, New Jersey. Franklin borough has a 2025 population of 5,094. Franklin borough is currently growing at a rate of 0.85% annually and its population has increased by 4.09% since the most recent census, which recorded a population of 4,894 in 2020.
The average household income in Franklin borough is $91,075 with a poverty rate of 8%. The median age in Franklin borough is 51.6 years: 53.2 years for males, and 49.4 years for females.