Port Madison Indian Reservation
| Location of the Port Madison Indian Reservation | |
| Total population | |
|---|---|
| 950 (2012) | |
| Regions with significant populations | |
| Puget Sound, Washington, U.S. | |
| Languages | |
| English, Lushootseed | |
| Related ethnic groups | |
| Suquamish, Duwamish, and Sammamish peoples | 
The Suquamish Indian Tribe of the Port Madison Reservation is a federally recognized tribe and Indian reservation in the U.S. state of Washington.
The tribe includes Suquamish, Duwamish, and Sammamish peoples, all Lushootseed-speaking Indigenous peoples of the Pacific Northwest, and was a signatory to the Treaty of Point Elliott of 1855. They had 950 enrolled tribal citizens in 2012.