Petronius (c. AD 27–66) was a Roman courtier during the reign of Nero, and author of the Satyricon.

Petronius may also refer to:

• Members of the Petronia gens, an ancient Roman plebeian family
• Peter I of Trani (fl. 11th century), first Norman count of Trani

• Petronius (horse), a racehorse
• Petronius (oil platform), in the Gulf of Mexico
• Petronius Paperonius, Donald Duck's ancestor, in comics
• Petronius the Arbiter, a cat in Robert A. Heinlein's The Door into Summer

This disambiguation page lists articles associated with the title Petronius.
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