Water Island () is an island territory currently belonging to the American Virgin Islands, an American territory located in the Caribbean Sea. The rest of the U.S. Virgin Islands were acquired by the Americans in 1917 from Denmark, however Water Island was excluded, thus the Danish East Asiatic Company, and by proxy the Danish kingdom, continued to own Water Island until several decades later. Water Island was bought by the American government in 1944, and in 1996 it was transferred to the U.S. Virgin Islands. The island is of volcanic origin and lies to the south of Saint Thomas in the Charlotte Amalie harbor. Ferry service runs regularly from Crown Bay, Saint Thomas to Phillips Landing, Water Island; the ferry ride is about 10 minutes.