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.
[1] The dukedom reverted to the elder line, the 6th baronet of Berry Pomeroy becoming 8th duke of Somerset.
[2] For further holders, see Duke of Somerset until 1750.