| Skagit Island Marine State Park | |
| Map: | Strait of Juan de Fuca#USA Washington#USA |
| Map Size: | 280 |
| Relief: | 1 |
| Location: | Skagit, Washington, United States |
| Coordinates: | 48.4136°N -122.5792°W |
| Area Acre: | 25 |
| Elevation: | 89feet |
| Established: | Unspecified |
| Operator: | Washington State Parks and Recreation Commission |
| Website: | Skagit Island Marine State Park |
Skagit Island Marine State Park is a public recreation area comprising 25acres Skagit Island in Skagit County, Washington. It is located 1miles east of Hoypus Point and 1.5miles east of Cornet Bay in Deception Pass State Park and is accessible only by boat. The island is wooded with occasional meadows, rock outcrops, beach, and a land trail.