It lies in Rosario Strait just off the eastern shore of Decatur Island and west of the city of Anacortes .
James Island is one of the San Juan Islands in San Juan County , Washington , United States .
James Island lies in Rosario Strait just off the eastern shore of Decatur Island and west of the city of Anacortes .
James Island is one of the San Juan Islands in San Juan County , Washington , United States .