This is a list of the Viceroys of Portugal during the Iberian Union (1580–1640). According to what was established in the Cortes of Tomar in 1581, the regency of the Kingdom of Portugal always had to be trusted by the king to a Portuguese, or in alternative to a member of the Royal Family. This was, in a general way, fulfilled, having during two periods the regency been trusted to a governmental council called Government Junta of the Kingdom of Portugal.
1580 : Fernando Álvarez de Toledo, 3rd Duke of Alba
1583 : Albert VII, Archduke of Austria
1593 : First Government Junta:
Miguel de Castro, Archbishop of Lisbon
João da Silva, Count of Portalegre
Francisco Mascarenhas
Duarte Castelo-Branco, Count of Sabugal
Miguel de Moura
1600 : Cristóvão de Moura, Marquess of Castelo Rodrigo (1st time)
1603 : Afonso Castelo-Branco, Count of Coimbra
1605 : Pedro Castilho, Bishop of Leiria
1608 : Cristóvão de Moura, Marquess of Castelo Rodrigo (2nd time)
1614 : Aleixo de Meneses, Bishop of Guarda
1615 : Miguel de Castro, Archbishop of Lisbon (Interim)
1615 : Diogo da Silva e Mendonça, Count of Salinas (1st time)
1621 : Second Government Junta:
Martim Afonso Mexia, Bishop of Coimbra (1621–1622)
Diogo de Castro and Nuno Álvares de Portugal (1622–1623)
Diogo de Castro and Diogo da Silva e Mendonça (2nd time) (1623–1626)
Diogo da Silva e Mendonça and Afonso Furtado de Mendonça (1627–1630)
António Ataíde and Nuno de Mendonça (1631–1633)
1633 : João Manuel, Archbishop of Lisbon
1633 : Diogo de Castro, Count of Basto
1634 : Margarida of Savoy, dowager Duchess of Mantua
