Saint Avitus may refer to:

• Avitus I of Clermont, 6th century bishop of Clermont
• Avitus II of Clermont, 7th century bishop of Clermont
• Avitus of Vienne 5th–6th century bishop of Vienne
• Avitianus, or Avitus of Rouen, 4th century bishop of Rouen
• Avit du Périgord [fr] (Avitus of Perigord), 5th–6th century monk
• Avit de Micy [fr] (Avitus of Micy), 6th century abbot

• Avitus (disambiguation)