The Metropolitan Archdiocese of Vrhbosna is an ecclesiastical archdiocese of the Catholic Church. Its territorial remit includes the eastern parts of Bosnia and Herzegovina and the entirety of the Republic of North Macedonia. Its episcopal see is the city of Sarajevo (Vrhbosna), the capital of Bosnia and Herzegovina. The archdiocese has the following suffragans: in North Macedonia the Diocese of Skopje; in Bosnia, the dioceses of Banja Luka, Mostar-Duvno and Trebinje-Mrkan.

The Diocese of Mostar-Duvno is a Latin Church diocese of the Catholic Church in Bosnia and Herzegovina. It encompasses northern Herzegovina. The episcopal seat is in Mostar, Bosnia and Herzegovina. It was formed on 5 July 1881, when the Apostolic Vicariate of Herzegovina was elevated to the diocese. It is the largest Catholic diocese in Bosnia and Herzegovina by the number of Catholics.