Roman Catholic Diocese of San Marcos

The Roman Catholic Diocese of San Marcos (erected 10 March 1951) is a suffragan diocese of the Archdiocese of Los Altos Quetzaltenango-Totonicapán.

Ordinaries

 * Celestino Miguel Fernández Pérez, OFM (1955–1971)
 * Próspero Penados del Barrio (1971–1983), appointed Archbishop of Guatemala
 * Julio Amílcar Bethancourt Fioravanti (1984–1988), appointed Bishop of Huehuetenango
 * Álvaro Leonel Ramazzini Imeri (1988–2012), appointed Bishop of Huehuetenango on 14 May 2012; future Cardinal
 * Carlos Enrique Trinidad Gómez (2014–2018)
 * Bernabé de Jesús Sagastume Lemus, OFMCap (2021–present)

Auxiliary bishops

 * Próspero Penados del Barrio (1966–1971), appointed bishop

Other priest of this diocese who became bishop

 * Félix Eduardo Antonio Calderón Cruz, appointed Bishop of San Francisco de Asís de Jutiapa in 2016