Saint Germanus or Saint Germanicus may refer to:
- Germanicus of Smyrna (died 155), saint and martyr
- Germanus (Cermanus, died 305), Spanish martyr-saint (see Servandus and Cermanus)
- Germanus of Auxerre (378–448), bishop of Auxerre who founded the Abbey of Saint-Germain d'Auxerre
- Germanus of Normandy (died 480), also known as Germanus the Scot
- Germanus of Capua (died 541), archbishop
- Germanus of Paris (496-576), also Saint Germain of Paris
- Germanus of Granfelden (died 675), Saint
- Germanus I of Constantinople (died c. 740), 39th Patriarch of Constantinople
- Sanctus Germanus, a titular see of the Roman Catholic Church