
Roselle
- County:
- Union County
- County Seat:
- No
- Area (mi²):
- 2.635
- State:
- New Jersey
Roselle is a borough located in Union County, New Jersey. Roselle has a 2025 population of 22,167. Roselle is currently declining at a rate of -0.39% annually and its population has decreased by -1.93% since the most recent census, which recorded a population of 22,604 in 2020.
The average household income in Roselle is $109,554 with a poverty rate of 10.36%. The median age in Roselle is 39.8 years: 38.5 years for males, and 41.1 years for females.