Alzira Coelho de Campos de Barros de Abreu Costa (20 April 1875 – 21 February 1970) was the wife of Portuguese politician Afonso Costa.

[1] She was the sister of the writer and politician José de Barros Mendes de Abreu, who was born on 20 July 1878.

[2] She married Afonso Costa in the New Cathedral of Coimbra, on 15 September 1892.

[3] She died at the age of 94, in Nossa Senhora de Fátima, Lisbon.

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