Mario Alberizzi (1609–1680) was a Roman Catholic prelate who served as Cardinal Priest of San Giovanni a Porta Latina (1675–1680), Archbishop (Personal Title) of Tivoli (1676–1679), and Apostolic Nuncio to Austria (1671–1675).

[1] In 1657, he was appointed Canon of the patriarchal Vatican basilica; and from 1657 to 1664, he served as Secretary of the Sacred Congregation of Propaganda Fide.

[1] On 19 January 1671 he was appointed during the papacy of Pope Clement X as Titular Archbishop of Neocaesarea in Ponto.

[1][3] On 27 May 1675 he was named by Pope Clement X as cardinal priest and received the title of San Giovanni a Porta Latina on 23 March 1676.

[1][3][2] On 22 June 1676 he was appointed during the papacy of Pope Clement X as Archbishop (Personal Title) of Tivoli.