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

Saddlebag Island State Park is a 24-acre (9.7 ha) public recreation area on Saddlebag Island in Padilla Bay, part of the San Juan Islands in Skagit County, Washington, about four miles (6.4 km) northeast of Anacortes. Dot Island and Huckleberry Island lie nearby. The island has no docks or mooring buoys, and its five primitive campsites are reached by boat.

Saddlebag Island was privately owned until 1974, when the state of Washington bought it for $192,000 to create a marine state park. The 24-acre island lies in Padilla Bay, four miles northeast of Anacortes, with Dot Island and Huckleberry Island nearby.

Saddlebag Island has five primitive campsites, and one is reserved for paddlers and sailors arriving on the Cascadia Marine Trail, a water route for human- and wind-powered craft. Campers reach the island by their own boat, since there are no docks or mooring buoys. The name comes from the island's outline, which resembles a saddlebag.

Reaching the island requires bringing a boat, and visitors should watch the tidal patterns of Padilla Bay throughout their stay. Poor timing with tides could leave vessels stuck, so planning your visit around water levels is important.

Saddlebag Island has no docks or mooring buoys, so every visitor arrives by anchoring or beaching a boat. One of its five primitive campsites is reserved for paddlers and sailors on the Cascadia Marine Trail, a long-distance water route through Puget Sound.