Hugh de Mapenor (or Hugh de Mapenore; died April 1219) was a medieval Bishop of Hereford. Although educated and given the title of magister, or "master", the details of his schooling are unknown. Mapenor was a clerk for Giles de Braose, his predecessor as bishop. Later, Mapenor served as Dean of Hereford before being elected as bishop against the wishes of King John of England. During his short episcopate, he supported John's son and successor King Henry III of England, and was active in his diocese, as a number of surviving documents show. He also served as a diplomat for the king.