Guillermo Castellanos Martínez (6 November 1959 – 30 August 2000) was a Mexican sports shooter and politician.
He competed in the mixed trap event at the 1984 Summer Olympics.
[2] He also won two gold medals at the Central American and Caribbean Games.
He was planning to run for mayor of Tijuana in 2000, but was shot and killed by his home on 30 August that year.
This biographical article relating to sport shooting in Mexico is a stub.