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==