Alberto Gainza Paz (March 16, 1899 – December 26, 1977) was an Argentine journalist and political activist who served as editor of the newspaper La Prensa.
Both parents belonged to powerful families in Argentina; especially Zelmira, who was the daughter of José Clemente Paz (deputy, diplomat and founder of the newspaper La Prensa), and Zelmira Diaz Gallardo.
La Prensa was suspended for five days in 1944, after criticizing the government's health program.
Gainza Paz and five other newspaper editors were arrested in 1945, charged with conspiring against the government.
That March the Congress ordered the arrest of Gainza Paz, who was already in exile in Uruguay.