SS Republic may refer to:
RMS Republic was a steam-powered ocean liner built in 1903 by Harland and Wolff in Belfast, and lost at sea in a collision six years later while sailing for the White Star Line. A CQD distress call was issued on the new Marconi radio device, the first recorded, resulting in the saving of around 1500 lives. Known as the "Millionaires' Ship" on account of the number of well-known and immensely rich Americans who traveled by her, she was often referred to as a "palatial liner." She was the flagship of White Star Line's Boston service and was one of the ten largest passenger liners in the world at the time.
The ship was originally built in Belfast, Northern Ireland for the International Mercantile Marine's Dominion Line (a sister company to the White Star Line) and was named SS Columbus. She was launched on 26 February 1903 and made her maiden voyage in October 1903 from Liverpool to Boston. After two voyages with the Dominion Line, the Columbus, along with three other Dominion liners; New England, Commonwealth and Mayflower were sold to the White Star Line for use on their new service between Liverpool and Boston on the North Atlantic run as well as services between both New York and Boston and the Mediterranean. The Columbus was renamed Republic, the second ship under White Star livery to hold the name (White Star's original Republic of 1872 had been sold over a decade earlier.), while her three fellow former Dominion liners were renamed Romanic, Canopic and Cretic respectively.
SS Republic was an ocean liner built in 1871 by Harland and Wolff for White Star Line. It was intended to be the last of four vessels forming the Oceanic class, before two new ships were commissioned. After a rough maiden voyage from Liverpool to New York on 1 February 1872, the ship was chosen to be on White Star Line's first voyage on the South Atlantic and Pacific line with four other ships, destined for Chile. In 1874, the construction of modern ships SS Germanic and SS Britannic led to SS Republic's becoming the standby vessel of White Star Line. It occupied this position for 15 years, and attempts were made to modernise it in 1888. When SS Teutonic and SS Majestic entered service in the following year, the Republic became surplus to White Star's needs.
Republic was sold in 1889 to Holland America Line and was renamed Maasdam, and served with the company for twelve years. In 1902, it was sold to Italian company La Veloce where it was renamed Vittoria, before being renamed again to Città di Napoli. It was used for many years to transport Italian migrants to America. It was retired in 1908, and was lent to the Italian government to house victims of the 1908 Messina earthquake. The ship was scrapped in 1910 in Genoa.