| Jurisdiction: | Diocese |
| San Juan de los Lagos | |
| Latin: | Dioecesis Sancti Ioannis a Lacubus |
| Local: | Diócesis de San Juan de los Lagos |
| Country: | Mexico |
| Metropolitan: | San Juan de los Lagos |
| 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: | Sede vacante |
| 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 (Latin: 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.