Østbye is a surname. Notable people with the surname include:
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Adolf Østbye (1868–1907), Norwegian revue artist and barber
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Gudbrand Østbye
Gudbrand Østbye (2 October 1885 – 2 June 1972) was a Norwegian army officer and historian. He was born in Gjøvik, a son of factory owner Anders Østbye and Ellen Anna Hovdenak. He was married to Ragna Heyerdahl Hørbye, and thus son-in-la ...
(1885–1972), Norwegian army officer and historian
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Peter Østbye
Peter Nielsen Østbye (20 February 1855 - Norway—2 February 1943) was a Norwegian philologist and academic administrator. He taught classical languages and was a proponent of learning the Latin language. He was an education official at Fredr ...
(1855–1943), Norwegian philologist and academic administrator
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Rolf Østbye (1898–1979), Norwegian businessman
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Sverre Østbye (1889–1984), Norwegian Nordic skier
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Norwegian-language surnames