The Roman Catholic Diocese of Covington is a Latin Church diocese in Northern Kentucky in the United States, The cathedral church of the diocese is the Cathedral Basilica of the Assumption in Covington.

The Roman Catholic St. Mary's Cathedral Basilica of the Assumption in Covington, Kentucky, is a minor basilica in the United States. Construction of the cathedral began under the Diocese of Covington's third bishop, Camillus Paul Maes, in 1895 to replace an 1834 frame church that was inadequate for the growing congregation. Pope Pius XII elevated the cathedral to the rank of minor basilica on December 8, 1953.