The Roman Catholic Diocese of Lomas de Zamora (erected 11 February 1957) is in Argentina and is a suffragan of the Archdiocese of Buenos Aires.
Bishops Ordinaries Filemón Castellano (1957–1963) Alejandro Schell (1963–1972) Desiderio Elso Collino (1972–2001) Agustín Roberto Radrizzani, S.D.B. (2001–2007 ), appointed Archbishop of Mercedes-Luján Jorge Ruben Lugones, S.J. (2008– )
Coadjutor bishop Alejandro Schell (1958–1963)
Auxiliary bishops Héctor Gabino Romero (1978–1984), appointed Bishop of Rafaela José María Arancedo (1988–1991), appointed Bishop of Mar del Plata Juan Carlos Maccarone (1993–1996), appointed Bishop of Chascomús Jorge Vázquez (2013–2017), appointed Coadjutor Bishop of Morón Carlos Alberto Novoa de Agustini, O.F.M. Cap. (2013); did not take effect Jorge Martín Torres Carbonell (2014–2020), appointed Bishop of Gregorio de Laferrere Jorge Ignacio García Cuerva (2017–2019), appointed Bishop of Río Gallegos Ignacio Damián Medina (2019-)
Other priests of this diocese who became bishops Gustavo Arturo Help, appointed Bishop of Venado Tuerto in 2000 Luis Alberto Fernández Alara, appointed Auxiliary Bishop of Buenos Aires in 2009
Territorial losses Year Along with To form 1961 Archdiocese of La Plata Diocese of Avellaneda 1969 Diocese of Morón Diocese of San Justo 2001 Diocese of Avellaneda Diocese of Avellaneda-Lanús
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