Jones Island State Park is a Washington state park coterminous with Jones Island, one of the San Juan Islands in San Juan County, Washington, United States. It is located one mile (1.6 km) west of the southwestern corner of Orcas Island and accessible only by boat. The island has a land area of 188 acres (76 ha) and no resident population. The island was named by the Wilkes Expedition in 1841 for naval officer Jacob Jones.