Juan Zorrilla de San Martín (28 December 1855 – 3 November 1931) was an Uruguayan epic poet and political figure.

He also wrote the Hymn to the Tree (Himno al Arbol), a well-known Spanish poem later made a song in several Latin-American countries.

He also worked as a journalist and helped establish the Catholic newspaper El Bien Público.

He was twice widowed, and left 13 children when he died, one of whom was José Luis Zorrilla de San Martín.

His grandson, Alejandro Zorrilla de San Martín, was to serve as a prominent Deputy, Minister and Senator.