Hugh or Hugo of Ostia () may refer to:
Hugh of Ostia (died 1158), cardinal-bishop of Ostia from 1150 Pope Gregory IX, born Ugolino, cardinal-bishop of Ostia in 1206–1227 Hugh of Saint-Cher, cardinal-bishop of Ostia in 1261–1262 Hugh Aycelin, cardinal-bishop of Ostia in 1294–1297