Geraldo José Rodrigues Alckmin Filho (; born 7 November 1952) is a Brazilian physician and politician who has served as the 26th vice president of Brazil since 1 January 2023. He previously served as the Governor of São Paulo from 2001 to 2006, and then again from 2011 to 2018, the longest term served in that state since the end of the Military dictatorship in Brazil. He was the Brazilian Social Democracy Party (PSDB) presidential nominee for the 2018 Brazilian presidential election, when he finished in fourth place, as well for the 2006 Brazilian presidential election, when he came in second place, losing in the runoff to then president Luiz Inácio Lula da Silva.
