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| See also: | List of years in Portugal | ||||
Events in the year 1820 in Portugal.
Incumbents
Events
- 22 January – Battle of Tacuarembó
- Liberal Revolution [1]
- 24 August – Military revolt in Porto [1]
- Establishment of a provisional junta of the Supreme Government of the Kingdom, in Porto [1]
- 15 September – Military revolt in Lisbon [1]
- Establishment of an interim government, in Lisbon [1]
- 28 September – Establishment of a unified provisional junta [1]
- 22 November – Instruções, first election law [1]
- December – Cortes election [1]
