| Jurisdiction: | Diocese |
| La Rioja | |
| Latin: | Dioecesis Rioiensis |
| Local: | Diócesis de La Rioja |
| Country: |  Argentina |
| Metropolitan: | San Juan de Cuyo |
| Province: | San Juan de Cuyo |
| Area Km2: | 92,100 |
| Population: | 305,000 |
| Population As Of: | 2004 |
| Catholics: | 265,350 |
| Catholics Percent: | 87 |
| Parishes: | 28 |
| Denomination: | Roman Catholic |
| Rite: | Roman Rite |
| Established: | 20 April 1934 (years ago) |
| Cathedral: | Cathedral Basilica of St Nicholas in La Rioja |
| Patron: | Saint Nicholas St Francis Solanus |
| Bishop: | Dante Gustavo Braida Lorenzón |
| Bishop Title: | Bishop |
| Metro Archbishop: | Jorge Eduardo Lozano |
| Emeritus Bishops: | Roberto Rodríguez |
The Roman Catholic Diocese of La Rioja (Latin: Dioecesis Rioiensis) is in Argentina and is a suffragan of the Archdiocese of San Juan de Cuyo.
On Tuesday, July 9, 2013, Pope Francis accepted the resignation from the pastoral care of the Roman Catholic Diocese of La Rioja (La Rioja, Argentina), presented by Bishop Roberto Rodríguez, in accordance with Canon 401.1 of the Latin-rite 1983 Code of Canon Law.
Pope Francis appointed as the next bishop of the same diocese, Bishop Daniel Marcelo Colombo, until now serving as the bishop of the Roman Catholic Diocese of Oran. Bishop Daniel Marcelo Colombo was born in the national capital and largest city, Buenos Aires, Argentina, on March 27, 1961, after earning a bachelor's degree of mercantile appraiser and the title of lawyer at the University of Buenos Aires. In 1982 he entered the seminary of Quilmes. Ordained a priest on 16 December 1988, in 1994 he obtained a doctorate in canon law from the Angelicum, in Rome. He held various positions in different parishes, in the Curia and the Seminary of Quilmes and was professor at the Faculty of Canon Law of the Catholic University Argentina and Episcopal Delegate at the Catholic University of La Plata. In 2004 he was appointed parish priest of the Cathedral of Quilmes.
He was appointed Bishop of Oran on May 8, 2008, and was consecrated on 8 August following.[1]
On 20 April 1934 Pope Pius XI founded the Diocese of La Rioja from territory taken from the Diocese of Córdoba del Tucumán.[2]