| Jurisdiction: | Diocese |
| Serrinha | |
| Latin: | Dioecesis Serrignensis |
| Local: | Diocese de Serrinha |
| Country: | Brazil |
| Province: | Feira de Santana |
| Metropolitan: | Feira de Santana |
| Area Km2: | 17,169 |
| Population: | 550,000 |
| Population As Of: | 2010 |
| Catholics: | 473,000 |
| Catholics Percent: | 86 |
| Denomination: | Catholic |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Established: | 21 September 2005 (years ago) |
| Cathedral: | Cathedral of Saint Anne in Serrinha |
| Bishop: | Hélio Pereira dos Santos |
| Metro Archbishop: | Zanoni Demettino Castro |
| Emeritus Bishops: | Ottorino Assolari, CSF |
The Roman Catholic Diocese of Serrinha (Latin: Dioecesis Serrignensis) is located in the Brazilian state of Bahia. It is a suffragan diocese of the Archdiocese of Feira de Santana.
The diocese was erected on 21 September 2005 with territory taken from the Archdiocese of Feira de Santana and the Diocese of Paulo Afonso[1]