Eastern Marsh Harrier
Circus spilonotus
- Least concern
- Card rarity: Common
- Birds

The eastern marsh harrier is a bird of prey belonging to the marsh harrier group of harriers. It was previously considered to be conspecific with the western marsh harrier but is now usually classified as a separate species. It has two subspecies: C. s. spilonotus in eastern Asia and C. s. spilothorax in New Guinea.
Classification
- Class
- Aves
- Order
- Accipitriformes
- Family
- Accipitridae
- Genus
- Circus