Roman Catholic Diocese of Nashville

The Diocese of Nashville (Latin: Dioecesis Nashvillensis) is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church in the central part of Tennessee in the United States. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Louisville. The bishop of Nashville, J. Mark Spalding, was appointed by Pope Francis in 2017.

The diocese was erected in 1837, taking all of Tennessee from the Diocese of Bardstown. Pope Gregory XVI appointed Richard Miles to become the first bishop of Nashville. During the late twentieth century, the dioceses of Knoxville and Memphis were formed from the eastern and western counties of the Diocese of Nashville.

The Diocese of Nashville is the largest diocese in Tennessee by population, encompassing 56 parishes that serve over 90,000 Catholics. The Cathedral of the Incarnation in Nashville, Tennessee, is the present seat of the bishop of Nashville.