Infante John, Constable of Portugal was a Portuguese infante (prince) of the House of Aviz, Constable of Portugal and master of the Portuguese Order of St. James (Santiago). In Portugal, he is commonly referred to as the O Infante Condestável.
- Position held
- Grand Master of the Order of Saint James of the Sword
- Citizenship
- Kingdom of Portugal
- Born
- January 13, 1400
- Died
- October 18, 1442