The Rothsay Castle (also spelt Rothesay Castle) was a paddle steamer built in 1816 for service on the River Clyde, Scotland, and was later transferred to Liverpool, England, where she was used for day trips along the coast of North Wales. She was shipwrecked on the Lavan Sands (Welsh: Traeth Lafan) at the eastern end of the Menai Strait, North Wales, in 1831, with the loss of 130 lives.