| Jurisdiction: | Diocese |
| Border: | Catholic |
| Libmanan | |
| Latin: | Dioecesis Libmanana |
| Local: | Diosesis kan Libmanan Diyosesis ng Libmanan |
| Coat: | Coat of arms of the Diocese of Libmanan.svg |
| Coat Size: | 150px |
| Country: |  Philippines |
| Province: | Caceres |
| Territory: | Western Camarines Sur (Cabusao, Del Gallego, Libmanan, Lupi, Milaor, Minalabac, Pamplona, Pasacao, Ragay, San Fernando, Sipocot) |
| Denomination: | Roman Catholic |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Established: | June 19, 2009 |
| Cathedral: | Cathedral of St. James the Apostle |
| Area Km2: | 1,862 |
| Population: | 539,854 |
| Population As Of: | 2021 |
| Catholics: | 500,984[1] |
| Catholics Percent: | 92.5 |
| Bishop: | José R. Rojas |
| Metro Archbishop: | Archbishop Rex Andrew Alarcon |
| Vicar General: | Camilo B. Palma, Jr. |
The Diocese of Libmanan (Latin: Dioecesis Libmanana) is a Roman Catholic diocese located in the municipality of Libmanan in the ecclesiastical province of Caceres in the Philippines.
| 1. | Bishop Prospero Nale Arellano | December 9, 1989 – May 19, 2008 | |
| 2. | Bishop José Rojas Rojas Jr. | May 19, 2008 – present | |