1820 in Portugal

Events in the year 1820 in Portugal.

Incumbents

 * Monarch: John VI

Events

 * 22 January – Battle of Tacuarembó
 * Liberal Revolution
 * 24 August – Military revolt in Porto
 * Establishment of a provisional junta of the Supreme Government of the Kingdom, in Porto
 * 15 September – Military revolt in Lisbon
 * Establishment of an interim government, in Lisbon
 * 28 September – Establishment of a unified provisional junta
 * 22 November – Instruções, first election law
 * December – Cortes election