| Jurisdiction: | Diocese |
| San Isidro de El General | |
| Latin: | Dioecesis Sancti Isidori |
| Local: | Diócesis de San Isidro de El General |
| Country: | Costa Rica |
| Metropolitan: | José Rafael Quirós Quirós |
| Province: | Province of San José de Costa Rica |
| Area Km2: | 10,346 |
| Population: | 369,000 |
| Population As Of: | 2010 |
| Catholics: | 359,000 |
| Catholics Percent: | 97.3 |
| Parishes: | 26 |
| Denomination: | Catholic Church |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Established: | 19 August 1954 (years ago) |
| Bishop Title: | Bishop |
| Bishop: | Juan Miguel Castro Rojas |
| Emeritus Bishops: | Ignacio Nazareno Trejos Picado Guillermo Loría Garita Gabriel Enrique Montero Umaña, O.F.M. Conv. |
| Map: | Costa Rica - Diocesi di San Isidro de El General.jpg |
The Diocese of San Isidro de El General (Latin: Dioecesis Sancti Isidori is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Costa Rica. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of San José de Costa Rica. It was erected as a diocese on 19 August 1954.
| Year | Along with | To form | |
|---|---|---|---|
| 1998 | Diocese of Puntarenas |