Olaf Martin Devik (20 December 1886 – 14 April 1987) was a Norwegian physicist and civil servant.

He took the examen artium at Kristiania Cathedral School in 1904,[1] and graduated from the Royal Frederick University with the cand.real.

From 1915 to 1918, he worked and lived at Haldde in Alta Municipality, together with Ole Andreas Krogness, who ran an aurora borealis observatory.

Their book was reissued many times, and competed with Daniel Isaachsen and Gabriel Gabrielsen Holtsmark's Fysikk for gymnasiet.

In 1931 Devik published the thesis Thermische und dynamische Bedingungen der Eisbildung in Wasserläufen, which earned him the dr.philos.

[1] In 1938 Devik left academia and became deputy under-secretary of state in the Ministry of Church and Education.

Among others, the Norwegian State Educational Loan Fund, the University of Bergen and SINTEF were created.