The Archdiocese of Genoa is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Italy. Erected in the 3rd century, it was elevated to an archdiocese on 20 March 1133. The archdiocese of Genoa was, in 1986, united with the Diocese of Bobbio-San Colombano, forming the Archdiocese of Genoa-Bobbio; however a split in 1989 renamed it the "Archdiocese of Genoa."

The Roman Catholic diocese of Bobbio was an Italian bishopric which existed from 1014 until 1986. The diocese was formed from the territory of the Abbey of Bobbio.