Østrup is a surname. Notable people with the surname include:
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Ernst Østrup
Ernst Vilhelm Østrup (21 September 1845, in Roskilde – 16 April 1917, in Frederiksberg) was a Danish botanist and phycologist, mainly working on diatoms.
In 1873 he received his ''cand. polyt.'' degree, and later worked as a schoolteacher in ...
(1845–1917), Danish botanist and phycologist, mainly working on diatoms
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Johannes Østrup (1867–1938), Danish philologist and professor
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Lauritz Christian Østrup
Lauritz Christian Østrup (6 June 1881 – 21 May 1940) was a Danish fencer. He competed at the 1908 and 1912 Summer Olympics
The 1912 Summer Olympics (), officially known as the Games of the V Olympiad () and commonly known as Stockholm ...
(1881–1940), Danish fencer
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