Jabarkan Gembala dari Prefektur Apostolik Ulaanbaatar

Mgr. Jerome van Aertselaer, C.I.C.M. (1922–1924)

Mgr. Everard Ter Laak, C.I.C.M. (1924–5 Mei 1931)

R.P. Wenceslao Selga Padilla, C.I.C.M. (19 April 1992–30 April 2002)

Mgr. Wenceslao Selga Padilla, C.I.C.M. (30 April 2002–25 September 2018)

sede vacante (25 September 2018–2 April 2020)

Mgr. Giorgio Marengo, I.M.C. (2 April 2020)