Bas v. Tingy, 4 U.S. (4 Dall.) 37 (1800) was a case in maritime law, argued before the United States Supreme Court in 1800. The parties were John Bas, owner of the private vessel Eliza which was captured by French privateers at sea, and Tingy, commander of a public armed vessel—the Ganges—which recovered the Eliza. Bas v. Tingy occurred in the political context of the Quasi-War, maritime skirmishes between the United States and France. The case is also notable as having the only recorded opinion of associate justice Alfred Moore.