The Roman Catholic Diocese of Diphu (Latin: Diphuen(sis)) is a diocese located in the city of Diphu in the ecclesiastical province of Guwahati in India.

• 5 December 1983: Established as Diocese of Diphu from the Metropolitan Archdiocese of Shillong–Gauhati. The foundation stone was blessed by Pope John Paul 2 during his pastoral visit to Shillong.

Bishops of Diphu (Latin Rite)

Year		Bishop
From	to
14 February 2007	9 April 2011	Bishop John Moolachira
12 March 2006	14 February 2007	Bishop John Thomas Kattrukudiyil (Apostolic Administrator )
(10 June 1994	7 December 2005	Bishop John Thomas Kattrukudiyil
5 December 1983	4 March 1992	Bishop Mathai Kochuparampil, S.D.B.

• GCatholic.org
• Catholic Hierarchy
• Diocese website

25°51′37″N 93°26′27″E / 25.8604°N 93.4407°E / 25.8604; 93.4407