Hope Island Marine State Park - Skagit County, Marine state park in Skagit County, United States.

Hope Island Marine State Park is a 200-acre (81 ha) marine state park on Hope Island at the northern end of Skagit Bay in Skagit County, Washington. The island has beaches, forest with occasional meadows and rock outcroppings, and five mooring buoys on its northern flank. Most of the island is a Natural Area Preserve closed to hiking and camping.

Hope Island was designated a marine state park by the Washington State Parks and Recreation Commission, and most of the island is now a Natural Area Preserve closed to hiking and camping. The 200-acre island lies at the northern end of Skagit Bay in Skagit County, near La Conner.

Herons nest at the southwestern end of Hope Island, which is part of a Natural Area Preserve where hiking and camping are not allowed. The birds can be watched from the water or from the open northern shore, not by walking to the nesting ground.

The park is accessible only by boat, with four primitive campsites on the north shore and mooring available through five buoys and specific dock spaces. Visitors need to arrange their own water supply and should be prepared for changing weather conditions typical of open water environments.

Most of Hope Island is a Natural Area Preserve where hiking and camping are closed, so the heron colony on the southwestern end cannot be visited. The five mooring buoys lie on the island's northern flank, away from that closed ground.