
Riverside
- County:
- Northumberland County
- County Seat:
- No
- Area (mi²):
- 0.116
- State:
- Pennsylvania
Riverside is a CDP located in Northumberland County, Pennsylvania. Riverside has a 2025 population of 238. Riverside is currently declining at a rate of -4.03% annually but its population has increased by 6.73% since the most recent census, which recorded a population of 223 in 2020.
The average household income in Riverside is $59,889 with a poverty rate of 8.02%. The median age in Riverside is 47.4 years: 47 years for males, and 57.4 years for females.