| Jurisdiction: | Diocese |
| Neuve de Julio | |
| Latin: | Dioecesis Sancti Dominici Novem Iulii |
| Local: | Diócesis de Nueve de Julio |
| Country: | Argentina |
| Province: | Mercedes-Luján |
| Area Km2: | 56,743 |
| Population: | 382,196 |
| Population As Of: | 2004 |
| Catholics: | 343,977 |
| Catholics Percent: | 90 |
| Parishes: | 38 |
| Denomination: | Roman Catholic |
| Rite: | Roman Rite |
| Established: | 11 February 1957 (years ago) |
| Cathedral: | Cathedral of St Dominic of Guzman in Nueve de Julio |
| Patron: | Saint Dominic Our Lady of Fátima |
| Bishop: | Ariel Edgardo Torrado Mosconi |
| Bishop Title: | Bishop |
| Metro Archbishop: | Jorge Eduardo Scheinig |
| Emeritus Bishops: | Martín de Elizalde |
| Map: | Diocesi di Nueve de Julio.jpg |
| Website: | Website of the Diocese |
The Roman Catholic Diocese of Neuve de Julio (la|Dioecesis Sancti Dominici Novem Iulii) is a Catholic diocese located in the city of Nueve de Julio, Buenos Aires Province. It is in the ecclesiastical province of Mercedes-Luján in Argentina, having had change of metropolitan from La Plata in 2019.
On 11 February 1957, Pope Pius XII established the Diocese of Neuve de Julio from the Diocese of Azul and the Diocese of Mercedes.[1] [2]