
Riverdale
- County:
- Morris County
- County Seat:
- No
- Area (mi²):
- 2.026
- State:
- New Jersey
Riverdale borough is located in Morris County, New Jersey. Riverdale borough has a 2025 population of 4,117. Riverdale borough is currently growing at a rate of 0.15% annually and its population has increased by 0.46% since the most recent census, which recorded a population of 4,098 in 2020.
The average household income in Riverdale borough is $112,976 with a poverty rate of 10.14%. The median age in Riverdale borough is 50.2 years: 47.5 years for males, and 53.1 years for females.