Geoffrey FitzGeoffrey de Mandeville, 2nd Earl of Essex and 6th Earl of Gloucester (c. 1191 – 23 February 1216)[1] was an English peer and member of the House of Lords. He was an opponent of King John.
He inherited the Earldom of Essex in 1213 from Geoffrey Fitzpeter, 1st Earl of Essex and the Earldom of Gloucester in 1213 from Amaury VI of Montfort-Évreux.
He married as her second husband, Isabel of Gloucester after her marriage was annulled from John I of England.
He was succeeded by his brother, William FitzGeoffrey de Mandeville, 3rd Earl of Essex.