Guillermo Avalos

Guillermo Avalos (23 February 1923 – 19 March 1978) was an Argentine athlete who competed in the 1948 Summer Olympics in the 800m and 4 × 400 m relay, but he failed to advance past the first round in either event.

Avalos died in Béccar on 19 March 1978, at the age of 55.