USS East Hampton (SP-556) was a United States Navy minesweeper, patrol vessel, and lightvessel in commission from 1917 to 1919. East Hampton was built as a commercial steam trawler of the same name by Cobb and Butler at Rockland, Maine, in 1913. On 18 April 1917, the U.S. Navy purchased her from the Trident Fisheries Company of Portland, Maine, for use as a section patrol vessel and minesweeper during World War I. She was commissioned as USS East Hampton (SP-573) on 8 May 1917 with Lieutenant John O'Brien, USNRF, in command.