David Castillo i Buïls (born Barcelona, 1961) is a Spanish poet, writer, and literary critic.

He started out as a poet with counterculture and underground publications in the 1970s, although his first published work, a declaration of principles, was the biography of Bob Dylan in 1992.

Then he began a career as a writer with novels like El cel de l'infern and No miris enrere, that were well accepted both by critics and the general public.

El cel de l'infern was awarded the Crexells Prize [ca] for the best Catalan novel of the year in 1999.

Together with the young poet Marc Sardà, he has published the book Conversaciones con Pepín Bello, which has had a deep impact in criticism.