Manuel "Lito" G. Peña Jr. (November 17, 1924 - October 12, 2013) was a state legislator and activist in the US state of Arizona. Known informally as the "godfather" of the Democrats in the Arizona Senate, Peña served in the state legislature for 30 years, from 1967 to 1996. He was also remembered for his work in school desegregation and voter registration.