The Beresford, later Beresford-Peirse Baronetcy, of Bagnall in the County of Waterford, is a title in the Baronetage of the United Kingdom.

He was an admiral in the Royal Navy and also represented Coleraine, Berwick-on-Tweed, Northallerton and Chatham in the House of Commons.

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 Elizabeth, daughter of Henry Peirse.

He served as Chairman of the North Riding of Yorkshire County Council.

The heir apparent is the present holder's son, Harry Tamlyn de la Poer Beresford-Peirse (born 2007).