The Archdiocese of Owerri (Latin: Archidioecesis Overriensis) is a Latin Catholic archdiocese of the Catholic Church in Owerri, Imo State, Nigeria. The Seat of Wisdom Seminary is in Owerri.
The diocese dates back to the Vicariate Apostolic of Owerri, which was created on February 12, 1948, when the Vicariate Apostolic of Onitsha-Owerri was split. On April 18, 1950, it was elevated to a diocese. On March 26, 1994, it became an archdiocese.
On 27 December 2020, auxiliary bishop Moses Chikwe and his driver were kidnapped by gunmen in Owerri. They were both released unharmed and without ransom, on 1 January 2021.
The archdiocese covers an area of .
1,079,950 (69.4%) of the 1.55 million people (2023) in the area are Catholic. The archdiocese hosts 376 total priests (297 diocesan and 117 religious (2023). There are 164 parishes in the archdiocese (2023).