Fernando de Errázuriz y Martínez de Aldunate (Latin American Spanish: [feɾˈnando eˈrasuɾis alduˈnate]; 1 June 1777 – 16 August 1841), also known as Fernando Errázuriz Aldunate, was a Chilean political figure.

On 2 October 1801 he married María del Carmen Sotomayor Elzo, with whom he had 8 children.

On the morning of 28 January 1823 an open council meeting was convened to ask for the abdication of the Supreme Director Bernardo O'Higgins.

The Government Junta was formed by Agustín de Eyzaguirre, Errázuriz and José Miguel Infante.

Then he was succeeded by José Joaquín Prieto, who had been elected in the convened presidential vote.