Pedro I may refer to:
People Pedro I Fadrique (; ), Count of Salona Pedro I of Portugal (1320–1367; ), King of Portugal Pedro I of Castile (1334–1369; ), King of Castile and León Pedro I of Kongo (1478–1566; ), Manikongo (ruler of the Kingdom of Kongo) Pedro I of Brazil (1798–1834), Emperor of Brazil () and King of Portugal ()
Other uses Brazilian ship Pedro I
See also Peter I (disambiguation) Wyreema, an Australian steamer that was sold to Brazil as Dom Pedro I