1864 in Portugal
# 1864 in Portugal

Events in the year 1864 in Portugal.

## Incumbents

* Monarch: Louis I
* Prime Minister: Nuno José Severo de Mendoça Rolim de Moura Barreto, 1st Duke of Loulé

## Events

* 11 September - Legislative election.
* 29 September – Signing of the Treaty of Lisbon, on boundaries between Spain and Portugal
* Banco Nacional Ultramarino established

## Births

* 6 June – Alfredo de Sá Cardoso, military officer and politician (died 1950)
* 11 August – Duarte Leite, historian, mathematician, journalist, diplomat and politician (died 1950)
