Richard Longfield (7 May 1802 – 18 June 1889) was an Irish Member of Parliament. He was born the eldest son of John and Eleanor (née Lucas) Longfield of Longueville. He was appointed High Sheriff of County Cork for 1833–34, an office that had also been held (1829–30) by his father. He married twice;firstly Harriett Elizabeth, the daughter of John M'Clintock, with whom he had one son (killed in the Crimea) and secondly Jemima Lucy, the daughter of Wyrley Birch of Norfolk, with whom he had three sons and two daughters.