Affonso Schmidt (29 June 1890 – 3 April 1964) was a Brazilian journalist, short story writer, novelist, and playwright.

In Cubatão, he founded the newspaper Vésper, and in the city of São Paulo he was part of the editorial staff of the important libertarian periodicals A Plebe and A Lanterna, alongside legendary figures of the Brazilian anarchist movement such as Edgard Leuenroth and Oreste Ristori [pt].

In the city of Rio de Janeiro, he founded the newspaper Voz do Povo, which in time became the press organ of the local Workers' Federation.

He also gained notoriety for the various campaigns he waged against fascism and clericalism, through pamphlets, books, plays and newspaper articles.

Writing intensively throughout his life, he was the author of a vast poetic and literary work gathered in more than forty books.