The Eparchy of Saint Thomas the Apostle is a Chaldean Catholic diocese in Sydney, Australia, and is immediately subject to the Holy See.

The eparchy was created in 2006. Djibrail Kassab was appointed bishop at that time; he was based in Basrah, Iraq before he was posted to Oceania. His bishopric currently sits as St. Thomas the Apostle Chaldean Catholic Church, Bossley Park, New South Wales.

In 2015, he was succeeded by Archbishop Amel Shamon Nona.

• St. Thomas the Apostle Chaldean Catholic Cathedral, Bossley Park, New South Wales, Australia
• St. Mary's Assumption Chaldean Catholic Church, Fairfield, New South Wales, Australia
• St. Joseph Chaldean Catholic Church, Mount Druitt, New South Wales, Australia
• St. George Chaldean Catholic Church, Campbellfield, Victoria, Australia
• Our Lady Guardian of Plants Chaldean Catholic Church, Campbellfield, Victoria, Australia
• St Addai Chaldean Catholic Church, Manukau, Auckland, New Zealand

• Roman Catholicism in Australia

• "Eparchy of Saint Thomas the Apostle of Sydney (Chaldean)". Catholic-Hierarchy. Retrieved 5 January 2007.
• GCatholic.org

33°52′00″S 151°12′27″E / 33.86667°S 151.20750°E / -33.86667; 151.20750