Apostolic Vicariate of Nekemte

• January 28, 1913: Established as Apostolic Prefecture of Southern Kaffa / Kaffa Meridionale (Italiano), on territory split off from the Apostolic Vicariate of Galla
• September 8, 1913: Renamed as Apostolic Prefecture of Kaffa
• March 25, 1937: Promoted as Apostolic Vicariate of Gimma, hence entitle to a titular bishop, having lost territory to establish the Apostolic Prefecture of Neghelli
• Lost territories on 1940.02.13 to establish Apostolic Prefecture of Hosanna and Apostolic Prefecture of Endeber
• September 3, 1982: Renamed after its see as Apostolic Vicariate of Nekemte / Nekemteën(sis) (Latin)
• Lost territory on 1994.06.10 to establish Apostolic Prefecture of Jimma–Bonga.

As per 2014, it pastorally served 46,900 Latin Catholics (0.6% of 7,831,000 total) on 98,792 km² in 93 parishes and 26 missions with 38 priests (30 diocesan, 8 religious), 6 deacons, 56 lay religious (14 brothers, 42 sisters) and 15 seminarians .

Apostolic Prefect of Southern Kaffa

• Father Gaudenzio Barlassina, Consolata Missionaries (I.M.C.) (May 6, 1913 – September 8, 1913)

Apostolic Prefects of Kaffa

• Father Gaudenzio Barlassina, I.M.C. (September 8, 1913 – 1933)
• Fr. Luigi Santa, I.M.C. (July 14, 1934 – March 15, 1937)

Apostolic Vicars of Gimma

• Luigi Santa, I.M.C. (March 15, 1937 – November 1943), appointed Auxiliary Bishop of Rimini, Italy
  • Apostolic Administrator Urbain-Marie Person, O.F.M. Cap. (1952–1958)
  • Apostolic Administrator Fr. Frans Janssen, Lazarists (C.M.) (1958 – May 21, 1959)
• Frans Janssen, C.M. (see above May 21, 1959 – 1972)
  • Apostolic Administrator Fr. Herman Wilhelm Teuben, C.M. (1972 – December 17, 1977)
• Hendrik Joseph Alois Bomers, C.M. (December 17, 1977 – September 3, 1982)

Apostolic Vicars of Nekemte

• Hendrik Joseph Alois Bomers, C.M. (September 3, 1982 – October 19, 1983), appointed Coadjutor Bishop of Haarlem, Netherlands
• Fikre-Mariam Ghemetchu, C.M. (October 28, 1985 – January 18, 1994)
• Leonardus Dobbelaar, C.M. (June 10, 1994 – March 21, 2008)
  • Apostolic Administrator Theodorus Van Ruijven, C.M. (July 2008 – July 23, 2009)
• Theodorus Van Ruijven, C.M. (see above July 23, 2009 – November 10, 2013)
• Varghese Thottamkara, C.M. (first as (November 10, 2013^[1] – May 10, 2023)^[2]

• Varghese Thottamkara, C.M. (June 28, 2013 - November 10, 2013)

• List of Catholic dioceses in Ethiopia

• GCatholic.org - data for all sections
• Catholic Hierarchy ^{[self-published]}