The Archdiocese of Poznań (Latin: Archidioecesis Posnaniensis) is a Latin archdiocese of the Catholic Church. It is one of 14 archdioceses located in Poland, with the seat located in Poznań.

• 968: Established as Missionary Diocese of Poland with seat in Poznań subordinated directly to the Holy See
• 1000: Transformed to Diocese of Poznań subordinated directly to the Holy See
• 11th–12th century: Subordination of Diocese of Poznań to Metropolitan Archdiocese of Gniezno as suffragan diocese
• 16 July 1821: Raised to status of Metropolitan Archdiocese and joined with Archdiocese of Gniezno in personal union in aeque principaliter.
• 12 November 1948: dissolution of union between Archdioceses of Poznań and Gniezno as Primate of Poland Cardinal August Hlond appointed ordinary of the Archdioceses of Warsaw and Gniezno.

• Minor Basilicas:
  • Archicathedral Basilica of St. Peter and St. Paul, Poznań
  • Basilica on the Holy Mountain, Głogówko

• Kalisz

• Archbishop's Theological Seminary
• Society of Christ Major Seminary

• Bishops of Poznań
• Roman Catholicism in Poland

• GCatholic.org
• Catholic Hierarchy
• Diocese website

52°24′40″N 16°56′54″E / 52.41111°N 16.94833°E / 52.41111; 16.94833