Nils Olav Nilsen (24 January 1942 – 11 October 2021) was a Norwegian footballer who played as a striker in his early career, but was later used as a midfielder. He scored 19 goals in 62 matches for the Norway national team.
|Full name||Nils Olav Nilsen|
|Date of birth||24 January 1942|
|Place of birth||Stavanger, Norway|
|Date of death||11 October 2021(aged 79)|
|* Senior club appearances and goals counted for the domestic league only|
On club level Nilsen played for Viking, being team captain during their heyday in the early 1970s. With Nilsen a commanding figure, they won three league championships in 1972, 1973 and 1974. The supporters nicknamed him "Olav Viking".