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John
Hereditary Prince of Portugal
Túmulo do Infante D. João.jpg
Tomb in Mosteiro da Batalha
Born29 January 1451
Sintra National Palace, Sintra, Kingdom of Portugal
DiedFebruary 1451
Burial
HouseAviz
FatherAfonso V of Portugal
MotherIsabella of Coimbra
ReligionRoman Catholicism

John, Prince of Portugal (Portuguese: João; 29 January – February 1451) was a Portuguese infante, son of Afonso V and Isabella of Coimbra. He was born heir to the throne in 1451, but he died young during the same year. The title of Prince of Portugal then passed again to Infante Ferdinand, Duke of Viseu, his uncle.

John, Hereditary Prince of Portugal (1451) House of AvizCadet branch of the House of BurgundyBorn: 29 January 1451 Died: ? 1451 Preceded byFerdinand Hereditary Prince of Portugal 1451–1451 Succeeded byFerdinand