| Jurisdiction: | Diocese |
| Suchitepéquez-Retalhuleu | |
| Latin: | Dioecesis Suchitepequensis-Retalhulensis |
| Country: | Guatemala |
| Metropolitan: | Mario Alberto Molina Palma, O.A.R. |
| Province: | Province of Los Altos Quetzaltenango-Totonicapán |
| Area Km2: | 4,366 |
| Population: | 707,000 |
| Population As Of: | 2010 |
| Catholics: | 496,000 |
| Catholics Percent: | 70.2 |
| Parishes: | 18 |
| Denomination: | Roman Catholic |
| Rite: | Roman Rite |
| Established: | 31 December 1996 (years ago) |
| Cathedral: | Catedral San Bartolomé |
| Bishop Title: | Bishop |
| Bishop: | Pablo Vizcaino Prado |
| Map: | Guatemala - Diocesi di Suchitepéquez-Retalhuleu.png |
The Roman Catholic Diocese of Suchitepéquez-Retalhuleu (erected 31 December 1996) is a suffragan diocese of the Archdiocese of Los Altos Quetzaltenango-Totonicapán.