Matia Island /ˈmeɪʃə/ (MAY-shə) is an island in the San Juan Islands of the U.S. state of Washington. The island's entire 145 acres (59 ha) comes under the protection of the U.S. Fish and Wildlife Service and is cooperatively managed by the Washington State Parks and Recreation Commission as Matia Island Marine State Park. Matia Island is a National Wildlife Refuge, part of the San Juan Islands National Wildlife Refuge. A 2-acre (0.81 ha) camping area around Rolfe Cove is managed as a State Marine Park by the Washington State Parks and Recreation Commission under an agreement dating back to 1959. Pets, wood collecting, and campfires (excluding liquid fuel campstoves) are not allowed on the island. Except for the Wilderness Loop Trail and the campground, all areas above the high tide line a