Prince of Brazil (Portuguese: Príncipe do Brasil) was the title held by the heir-apparent to the Kingdom of Portugal, from 1645 to 1815.
The title's name has its origins in the State of Brazil, a colony of the Portuguese Empire.
The title was abandoned and changed to that of Prince Royal in the wake of Brazil's elevation from the status of a colony to the rank of a Kingdom united with Portugal in the United Kingdom of Portugal, Brazil and the Algarves.
Other members of the Brazilian Imperial Family were known by the title of Prince or Princess prefixed to their given names, with the style of Highness.
When Brazil broke away from the United Kingdom to become an independent Empire, the title of the Portuguese heir apparent was again changed to Prince Royal of Portugal and the Algarves.