Sir Edward Seymour, 3rd Baronet of Berry Pomeroy Castle was an English politician who sat in the House of Commons at various times between 1640 and 1688. He fought for the Royalist cause in the English Civil War.

Berry Pomeroy Castle, a Tudor mansion within the walls of an earlier castle, is near the village of Berry Pomeroy, in South Devon, England. It was built in the late 15th century by the Pomeroy family which had held the land since the 11th century. By 1547 the family was in financial difficulties and sold the lands to Edward Seymour, 1st Duke of Somerset. Apart from a short period of forfeit to the Crown after Edward's execution, the castle has remained in the Seymour family ever since, although it was abandoned in the late 17th century when the fourth baronet moved to Wiltshire.