Guillermo Alvarez

Guillermo Alvarez may refer to:
 * Guillermo Álvarez Macías (1919–1979), Mexican cooperative activist and general manager of Cemento Cruz Azul
 * Billy Álvarez, (born 1945), Mexican former businessman and former chairman of Cruz Azul
 * Guillermo Alvarez (gymnast) (born 1982), American gymnast