Tidfrith or Tidferth was an early 9th-century Northumbrian prelate. Said to have died on his way to Rome, he is the last known Anglo-Saxon bishop of Hexham. This bishopric, like the bishopric of Whithorn, probably ceased to exist, and was probably taken over by the authority of the bishopric of Lindisfarne. A runic inscription on a standing cross found in the cemetery of the church of Monkwearmouth is thought to bear his name.