SS Admiral was an excursion steamboat operating on the Mississippi River from the Port of St. Louis, Missouri. The vessel had a 1930s streamlined, Art Deco style, similar to the MV Kalakala and in contrast to the "gingerbread" ornamentation of more traditional Mississippi passenger and pleasure steamers. At 374 feet (114 m) long and 92 feet (28 m) wide, Admiral was longer than a city block, and the first all-steel inland steamer. At the time of its construction, Admiral was the largest passenger vessel on U.S. inland waterways. The boat was dismantled for scrap metal starting in 2011.