The Beresford, later Beresford-Peirse Baronetcy, of Bagnall in the County of Waterford, is a title in the Baronetage of the United Kingdom. It was created on 21 May 1814 for John Beresford. He was an Admiral in the Royal Navy and also represented Coleraine, Berwick-on-Tweed, Northallerton and Chatham in the House of Commons. Beresford was the illegitimate son of George Beresford, 1st Marquess of Waterford, and the brother of William Beresford, 1st Viscount Beresford. He was succeeded by his son, the second Baronet, from his first marriage to Mary Molloy. He died without surviving male issue and was succeeded by his nephew, the third Baronet. He was the eldest son of Henry William de la Poer Beresford-Peirse (1820–1859), eldest son of the first Baronet's second marriage to Harriett Elizabet