Antonio I (disambiguation)

António, Prior of Crato (1531–1595) would have been King Antonio I of Portugal.

Antonio I may also refer to:


 * Antonio I della Scala (1362–1388), Lord of Verona (ruled 1371–1387)
 * Antonio I Acciaioli (died 1435), Duke of Athens
 * Antonio I Ordelaffi (1390–1448), Lord of Forlì
 * António I of Kongo (died 1665), mwenekongo of the Kingdom of Kongo
 * Antonio I, Prince of Monaco (1661–1731), sovereign Prince of Monaco
 * Orélie-Antoine de Tounens (1825–1878), Antonio I of Araucanía and Patagonia