William Steffens

William Steffens (5 November 1880 – 1964) was a Norwegian military officer, born in Christiania (now Oslo), Norway.

During the Norwegian Campaign in 1940 he was head of the armed forces in Western Norway.

He was a delegate in Canada for the Norwegian government-in-exile in London in 1940 and 1941, and was military attaché in the Soviet Union from 1941 to 1945.

He sat as a military expert on the committee that prepared disarmament in Geneva in 1930.

In 1932 and 1933, he was back in Geneva as a military expert, this time in the main negotiations on disarmament.