The Roman Catholic Diocese of Njombe (Latin: Dioecesis Niombena) is a diocese located in Njombe in the ecclesiastical province of Songea in Tanzania.

• February 16, 1968: Established as Diocese of Njombe from the Diocese of Iringa and Territorial Abbacy of Peramiho

Ordinaries

• Raymond Mwanyika (16 January 1971 – 8 June 2002)
• Alfred Leonhard Maluma (8 June 2002 – 6 April 2021)
• Eusebio Samwel Kyando (19 October 2023 – present)

Other priests of this diocese who became bishops

• Castor Paul Msemwa, appointed Coadjutor Bishop of Tunduru-Masasi in 2004
• Norbert Wendelin Mtega, appointed Bishop of Iringa in 1985

• Roman Catholicism in Tanzania

• GCatholic.org
• Catholic Hierarchy

9°20′00″S 34°46′00″E / 9.333333°S 34.766667°E / -9.333333; 34.766667