| Jurisdiction: | Diocese |
| Nyahururu | |
| Latin: | Dioecesis Nyahururensis |
| Country: | Kenya |
| Metropolitan: | Nyeri |
| Rite: | Latin Rite |
| Cathedral: | Cathedral of Mary Immaculate |
| Area Km2: | 8,066 |
| Population: | 672,918 |
| Population As Of: | 2004 |
| Catholics: | 181,632 |
| Catholics Percent: | 27.0 |
| Emeritus Bishops: | Luigi Paiaro |
The Roman Catholic Diocese of Nyahururu (Latin: Dioecesis Nyahururensis) is a diocese located in the city of Nyahururu in the ecclesiastical province of Nyeri in Kenya.