The Diocese of Morón is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Argentina.

It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Buenos Aires in Argentina.

Its cathedra is a Minor Basilica : Catedral Basílica Inmaculada Concepción del Buen Viaje, in Morón, Buenos Aires, in the Argentine province of Buenos Aires, capital of the Morón partido, in the Greater Buenos Aires metropolitan area.

As per 2014, it pastorally served 664,000 Catholics (90.7% of 732,000 total) on 130 km2 in 53 parishes with 69 priests (53 diocesan, 16 religious), 30 deacons, 86 lay religious (25 brothers, 61 sisters) and 5 seminarians.

This article on a Roman Catholic diocese in Argentina is a stub.