The Roman Catholic Diocese of Telšiai is a suffragan Latin diocese in the ecclesiastical province of the Metropolitan of Kaunas, one of two in Lithuania.

The Metropolitan Archdiocese of Kaunas is a Latin Church ecclesiastical territory or archdiocese of the Catholic Church in Lithuania. The episcopal see is in Kaunas, the second-largest city in Lithuania. The archdiocese's motherchurch and cathedral is Kaunas Cathedral Basilica; it is also home to a Minor Basilica in a town of Šiluva, in the region of Samogitia.