Antoninus is a Latin masculine given name. It may refer to:

• Antoninus (philosopher), Neoplatonist philosopher of the 4th century
• Antoninus (turncoat), Roman who joined the Sassanid Empire and assisted Shapur II in the siege of Amida
• Antoninus Liberalis, Greek grammarian who lived between the first and third centuries AD
• Antoninus Pius (86–161), Roman emperor from 138 to 161
• Gaius Arrius Antoninus, 2nd century Roman senator
• Gnaeus Arrius Antoninus (born AD 31), maternal grandfather of Antoninus Pius
• Honoratus Antoninus, 5th century Roman Catholic Bishop
• Lucius Caesennius Antoninus (c. 95 – after 128), Roman aristocrat and consul
• Marcus Aurelius Antoninus (disambiguation), several emperors with the same regnal name
• Quintus Haterius Antoninus, 1st century Roman consul

• All pages with titles beginning with Antoninus
• All pages with titles containing Antoninus
• William Everson (poet) (1912–1994), also known as Brother Antoninus, American poet
• Saint Antoninus (disambiguation), several saints with the same name
• Antonin (disambiguation)
• Antonius, nomen of the gens Antonia, one of the most important plebeian families in Rome