Karl Evang (19 October 1902 – 3 January 1981) was a Norwegian physician and civil servant. He was born in Kristiania as a son of assisting secretary Jens Ingolf Evang (1873–1914) and Anna Beate Wexelsen (1875–1954). He was a brother of Vilhelm Evang, and a relative of Vilhelm Andreas Wexelsen, Per Kvist and Gunnar Jahn. His sister Anne Beate married another civil servant, Karl Ludvig Bugge. Karl Evang met physician Gerda S. Landmark Moe (1905–1985) in 1926, and married her in 1929. He suffered from a stroke, and subsequent aphasia from 1976 to his death in January 1981 in Oslo.