The Roman Catholic Diocese of Concepción () is in Argentina and is a suffragan of the Archdiocese of Tucumán.
History On 12 August 1963 Saint John XXIII founded the Diocese of Concepción from territory taken from the Archdiocese of Tucumán.
Bishops Ordinaries Juan Carlos Ferro (1963–1980) Jorge Arturo Meinvielle, S.D.B. (1980–1991), appointed Bishop of San Justo Bernardo Enrique Witte, O.M.I. (1992–2001) Armando José María Rossi, O.P. (2001–2020) José Melitón Chávez (2020–2021) José Antonio Díaz (2021–present)
Coadjutor bishops Armando José María Rossi, O.P. (2000–2001) José Melitón Chávez (2019–2020)
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