Gaudentius may refer to

• Gaudentius (music theorist) (2nd century CE?), Greek musical theorist
• Gaudentius (magister equitum), the father of the Roman magister militum Flavius Aëtius
• Gaudentius (son of Aetius), son of Flavius Aëtius
• St. Gaudentius of Brescia (died 410), bishop of Brescia, defender of John Chrysostom
• St. Gaudentius of Novara (5th century), to whom the Basilica of San Gaudenzio is dedicated.
• St. Gaudentius of Verona (5th century), Bishop of the Roman Catholic Diocese of Verona
• Gaudentius of Celeia, (5th–6th century), Bishop of Celeia (a Roman town at the site of modern Celje, Slovenia)
• Radim Gaudentius (970- 106/1020), a member of Slavnik's dynasty, was the first archbishop of Gniezno from 1000 until 1006/1020
• Gaudentius of Ossero (11th century), bishop of Ossero
• Gaudentius of Rimini (4th century), bishop of Rimini and martyr