| Jurisdiction: | Diocese |
| Marsabit | |
| Latin: | Dioecesis Marsabitensis |
| Country: | Kenya |
| Metropolitan: | Nyeri |
| Rite: | Latin Rite |
| Cathedral: | Pro-Cathedral of Our Lady of Consolata |
| Area Km2: | 78,078 |
| Population: | 201,266 |
| Population As Of: | 2004 |
| Catholics: | 22,100 |
| Catholics Percent: | 11.0 |
| Bishop: | Peter Kihara Kariuki, I.M.C. |
The Roman Catholic Diocese of Marsabit (Latin: Dioecesis Marsabitensis) is a diocese located in the city of Marsabit in the ecclesiastical province of Nyeri in Kenya.