James Island is one of the San Juan Islands in San Juan County, Washington, USA. It lies in Rosario Strait just off the eastern shore of Decatur Island, and west of the city of Anacortes. The entire island comprises James Island State Park of the Washington State Park System. It has a land area of 113 acres (46 ha) with 12,335 feet (3,760 m) of saltwater shoreline. It has three different camping areas, each with at least one toilet. The camping areas combine for a total of 13 campsites and are connected by a loop trail.