Alirio Díaz (12 November 1923 – 5 July 2016) was a Venezuelan classical guitarist and composer, considered one of the most prominent composer-guitarists of South America and an eminent musician. He studied with Andrés Segovia, and gave concerts all over the world.

A guitar competition named Concurso Internacional de Guitarra Alirio Díaz has been held in his honor in Caracas and other cities in Venezuela (the April 2006 contest was held in Carora). Many compositions have been dedicated to Díaz including Spanish composer Joaquín Rodrigo's Invocación y Danza. Many talented and gifted students were invited and participated in his master classes in Alessandria Italy including his favorite student guitarist and composer Cris Alcamo.