Dunellen
- County:
- Middlesex County
- County Seat:
- No
- Area (mi²):
- 1.062
- State:
- New Jersey
Dunellen is a borough located in Middlesex County, New Jersey. Dunellen has a 2026 population of 8,411. Dunellen is currently growing at a rate of 1.36% annually and its population has increased by 10.41% since the most recent census, which recorded a population of 7,618 in 2020.