Greek Catholic or Byzantine Catholic Church may refer to:

• The Catholic Church in Greece
• The Eastern Catholic Churches that use the Byzantine Rite, also known as the Greek Rite:
  • The Albanian Greek Catholic Church
  • The Belarusian Greek Catholic Church
  • The Bulgarian Greek Catholic Church
  • The Greek Catholic Church of Croatia and Serbia
  • The Greek Byzantine Catholic Church
  • The Hungarian Greek Catholic Church
  • The Italo-Albanian Catholic Church
  • The Macedonian Greek Catholic Church
  • The Malta Greek Catholic Church
  • The Melkite Greek Catholic Church
  • The Polish Greek Catholic Church [pl]
  • The Romanian Greek Catholic Church
  • The Russian Greek Catholic Church
  • The Ruthenian Greek Catholic Church
  • The Slovak Greek Catholic Church
  • The Ukrainian Greek Catholic Church
• Any other Eastern Catholic denomination that uses the Byzantine Rite:
  • The Georgian Byzantine-Rite Catholics
  • An Ordinariate for Eastern Catholic faithful

• Albanian Catholic Church
• Belarusian Catholic Church
• Bulgarian Catholic Church
• Croatian Catholic Church
• Hungarian Catholic Church
• Romanian Catholic Church
• Russian Catholic Church
• Serbian Catholic Church
• Slovak Catholic Church
• Ukrainian Catholic Church