The Diocese of Oslo is the Church of Norway's bishopric for the municipalities of Oslo, Asker and Bærum. It is one of Norway's five traditional bishoprics and was founded around the year 1070.

Ole Christian Mælen Kvarme is a Norwegian prelate of the Church of Norway who served as Bishop of Oslo from 2005 to 2017. As Bishop of Oslo, Kvarme was the personal prelate of the Norwegian royal fami