Baron Seymour of Trowbridge was a title in the Peerage of England. It was created on 19 February 1641 for Francis Seymour, a younger son of Edward Seymour, Lord Beauchamp, for his support of Charles I in Parliament. It became a subsidiary title of the Duke of Somerset in 1675, and became extinct on the death of Algernon Seymour, 7th Duke of Somerset in 1750.