The Diocese of Adria-Rovigo is a Latin diocese of the Catholic Church in the Triveneto. It has existed under this name since 1986. It is a Latin suffragan to the Patriarchate of Venice.

The Patriarchate of Venice, also sometimes called the Archdiocese of Venice, is a Latin Church ecclesiastical territory or patriarchal archdiocese of the Catholic Church in Venice, Italy. In 1451 the Patriarchate of Grado was merged with the Bishopric of Castello and Venice to form the Archdiocese of Venice.