SS Indiana was an iron passenger-cargo steamship built by William Cramp & Sons in 1873. The third of a series of four Pennsylvania-class vessels, Indiana and her three sister ships – Pennsylvania, Ohio and Illinois – were the largest iron ships ever built in the United States at the time of their construction, and among the first to be fitted with compound steam engines. They were also the first ships to challenge British dominance of the transatlantic trade since the American Civil War.