Ignácio de Loyola Brandão (born 31 July 1936) is a Brazilian writer, perhaps best known as the author of the dystopian science-fiction novel Zero; the story of Brazil in the 1960s under a totalitarian regime.

In his teens, he wrote movie reviews for a trade paper called A Folha Ferroviária (The Railroad Folio).

In 1956, he relocated to São Paulo, the state capital, where he worked for Ultima Hora (Last Hour), a left leaning tabloid periodical.

In 2016, the Brazilian Academy of Letters awarded him the Prêmio Machado de Assis for his collected works.

He holds seat number 37 at the Academia Paulista de Letras and was elected for the Brazilian Academy of Letters in 2019.