Otgar, Otger or Odgar is a Germanic masculine given name (from Proto-Germanic *Audawakraz). It may refer to:

• Saint Otger [nl] (fl. 8th century), missionary
• Autchar (fl. 8th century), Frankish nobleman
• Otgar of Mainz, archbishop (826–847)
• Otgar [de], bishop of Eichstätt (847–880)
• Hoger (died 906), abbot and music theorist
• Otgar, founding abbot of Saint-Pons-de-Thomières (937–940)
• Otgar, bishop of Speyer (962–970)
• Otger of Girona [ca], Catalan count (c.862–c.872)
• Otger Cataló, figure of Catalan legend

• Hoger
• Ogier (disambiguation)