Olav Bergersen (2 July 1880 – 1973) was a Norwegian naval officer, war historian, insurance inspector and politician.

He was a member of the Storting from 1931–1933, and served with the Admiral Staff of the Royal Norwegian Navy in London during the Second World War.

[1] During the Second World War he was held five months in 1942 at the Falstad concentration camp,[3] as a hostage.

In 1943 he escaped German-occupied Norway to neutral Sweden and made his way to the United Kingdom, where he served with the admiral staff of the Royal Norwegian Navy.

[2] He edited a book on Tordenskiold's letters in 1964,[2] and wrote the two-volume Nøytralitet og krig in 1966.