- Language: Munsee
- Alternate names: Delaware, Ontario Delaware, Munsee Delaware, Canadian Delaware
- Language code: umu
- Language family: Algic, Algonquian, Eastern Algonquian, Delaware (SIL classification)
- Number of speakers: few
- Vulnerability: Endangered
- Script: Latin script.
Munsee, originally the language of the lower Hudson River, including the New York City metropolitan area, is the heritage language of the Delaware First Nation, on the Moraviantown Reserve, near Thamesville, Ontario.