Marcellus
- County:
- Onondaga County
- County Seat:
- No
- Area (mi²):
- 0.639
- State:
- New York
Marcellus is a village located in Onondaga County, New York. Marcellus has a 2026 population of 1,774. Marcellus is currently growing at a rate of 0.8% annually but its population has decreased by -1.06% since the most recent census, which recorded a population of 1,793 in 2020.