The Diocese of Celje (Latin: Dioecesis Celeiensis; Slovene: Škofija Celje) is a Latin Church diocese of the Catholic Church located in the city of Celje in the ecclesiastical province of Maribor in Slovenia.

• April 7, 2006: Established as Diocese of Celje from the Diocese of Maribor

• Bishops of Celje (Roman rite)
  • Anton Stres (7 April 2006 — 31 January 2010)
  • Stanislav Lipovšek (24 April 2010 – 18 September 2018)
  • Maksimilijan Matjaž (since 5 March 2021)

• Minor basilica:
  • Bazilika Marijinega obiskanja, Petrovče by Celje
  • Bazilika sv. Marije lurške, Brestanica

• Roman Catholicism in Slovenia

• Media related to Roman Catholic Diocese of Celje at Wikimedia Commons
• Official site
• GCatholic.org
• Catholic Hierarchy

46°13′44.95″N 15°15′45.9″E / 46.2291528°N 15.262750°E / 46.2291528; 15.262750