Star of India is an iron-hulled sailing ship, built in 1863 in Ramsey, Isle of Man as the full-rigged ship Euterpe. After a career sailing from Great Britain to India and New Zealand, she was renamed, re-rigged as a barque, and became a salmon hauler on the Alaska to California route. Retired in 1926, she was restored as a seaworthy museum ship in 1962–3 and home-ported at the Maritime Museum of San Diego in San Diego, California. She is the oldest ship still sailing regularly and also the oldest iron-hulled merchant ship still afloat. The ship is both a California Historical Landmark and United States National Historic Landmark.

Iron-hulled sailing ships represented the final evolution of sailing ships at the end of the age of sail. They were built to carry bulk cargo for long distances in the nineteenth and early twentieth centuries. They were the largest of merchant sailing ships, with three to five masts and square sails, as well as other sail plans. They carried lumber, guano, grain or ore between continents. Later examples had steel hulls. They are sometimes referred to as "windjammers" or "tall ships". Several survive, variously operating as school ships, museum ships, restaurant ships, and cruise ships.