Sir Edward Seymour, 3rd Baronet (10 September 1610 – 4 December 1688) 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. Seymour was the eldest son of Sir Edward Seymour, 2nd Baronet, of Berry Pomeroy Castle, and his wife Dorothy Killegrew and a descendant of Edward Seymour, 1st Duke of Somerset, in the senior line. Because of the adultery of the Duke's first wife, the Dukedom had been entailed with preference to the sons of his second marriage.