| Jurisdiction: | Diocese |
| San Juan de los Lagos | |
| Latin: | Dioecesis Sancti Ioannis a Lacubus |
| Local: | Diócesis de San Juan de los Lagos |
| Country: | Mexico |
| Metropolitan: | Francisco Robles Ortega |
| Territory: | State of Jalisco, |
| Province: | Archdiocese of Guadalajara |
| Population: | 1,115,000 |
| Population As Of: | 2014 |
| Catholics: | 1,084,000 |
| Catholics Percent: | 97.2 |
| Parishes: | 80 |
| Denomination: | Roman Catholic |
| Rite: | Roman Rite |
| Established: | January 25, 1941 |
| Cathedral: | Cathedral Basilica of San Juan de los Lagos |
| Patron: | Our Lady of San Juan de los Lagos |
| Bishop: | José Leopoldo González González |
| Emeritus Bishops: | Felipe Salazar Villagrana |
| Map: | Roman Catholic Diocese of San Juan de Lagos in Mexico.jpg |
| Website: | http://www.dsanjuan.com/diocesis/ |
The Roman Catholic Diocese of San Juan de los Lagos (la|Dioecesis Sancti Ioannis a Lacubus|links=no) (erected 25 March 1972) is a suffragan diocese of the Archdiocese of Guadalajara.It encompasses some of the surrounding cities in the Mexican state of Jalisco, including Lagos de Moreno, Tepatitlán and Arandas. Since 25 May 2024, the Diocese has been led by Bishop José Leopoldo González González.