The Diocese of San Leone (Latin: Dioecesis Sancti Leonis) was a Latin Church ecclesiastical jurisdiction or diocese of the Catholic Church located in the Italian town of San Leone in Calabria. In 1547, it was suppressed to the Archdiocese of Trani. It was restored as a titular see in 1966.
Erected: 1322<br> Latin Name: Sancti Leonis<br> Metropolitan: Archdiocese of Santa Severina
27 November 1571: Suppressed to the Archdiocese of Santa Severina