| Type: | Bishop |
| Honorific-Prefix: | Most Reverend |
| Leif Thor Olafsson | |
| Bishop of Bjørgvin | |
| Church: | Catholic Church |
| Diocese: | Diocese of Bjørgvin |
| Term: | 1451–1455 |
| Predecessor: | Olav Hartviktson |
| Successor: | Paolo Giustiniani |
| Death Date: | 1 Sep 1455 |
| Death Place: | Bjørgvin, Norway |
| Previous Post: | Bishop of Viborg (1440–1451) |
| Appointed: | 14 Apr 1451 |
Leif Thor Olafsson, also Thorleiv Olavsson (died 1 Sep 1455) was a Roman Catholic prelate who served as Bishop of Viborg (1440–1451) and Bishop of Bjørgvin (1451–1455).[1] [2] [3] [4] [5]
In 1440, Leif Thor Olafsson was appointed during the papacy of Pope Eugene IV as Bishop of Viborg. On 14 Apr 1451, he was appointed during the papacy of Pope Nicholas V as Bishop of Bjørgvin He served as Bishop of Bjørgvin until his death on 1 Sep 1455. at Munkeliv Abbey during an attack by Hanseatic merchants pursuing Olav Nilsson, commander of the royal castle in Bergen, who had sought sanctuary in the abbey.[6] Olav Nilsson was also killed.