Antonio Álvarez Desanti (born July 6, 1958) is a Costa Rican politician, lawyer and businessman who has served twice as President of the Legislative Assembly (1995-1996 and 2016).

In November he is named Executive President of the National Production Council, a position in which he continued during the administration of Óscar Arias Sánchez.

At the National Liberationist Convention held on June 3, 2001, Álvarez Desanti ran as presidential candidate and was defeated by Rolando Araya Monge and José Miguel Corrales Bolaños, being the last of the three pre-candidates.

Álvarez affirmed that the ruling corruption and the estrangement of the PLN leadership from its social democratic principles and ideology supported its decision.

This decision was criticized, but Alvarez assured that there was a new social democratic and progressive base that allowed him to return, and that he aspired to be presidential candidate of that grouping.

On October 8, 2010, Álvarez Desanti informed the press of his decision to present his candidacy again in the National Liberation Party, with a view to the 2014 presidential elections.

In January 2011, Álvarez Desanti launched a series of short television programs, in which he tackled issues such as animal rights, financial management, remote work, and social networks.

On November 2, 2016, through the newspaper La Nación, Desanti stressed his interest in becoming the candidate for the National Liberation Party and stated that there will be a polarization between him and Jose María Figueres Olsen.