Events from the year 1949 in Denmark.
- 6 March – Robert Storm Petersen, cartoonist, painter, inventor, writer (born 1882)
- 30 March – Prince Harald, royal, army officer (born 1876)
- 27 May – Martin Knudsen, physicist and researcher after whom the Knudsen gas state, the Knudsen number, and the Knudsen layer are named (born 1871)
- 28 June – Laurits Larsen, Olympic sport shooter and bronze medalist (born 1872)
- 13 September – August Krogh, professor at the department of zoophysiology at the University of Copenhagen 1916–1945, recipient of the Nobel Prize in Physiology or Medicine in 1920 (born 1874)
- 28 September – Nancy Dalberg, composer (born 1881)