Oszkár Demján

Oszkár Demján (28 December 1891 – 4 September 1914) was a Hungarian breaststroke swimmer who competed in the 1912 Summer Olympics. In 1912, he was eliminated in the semi-finals of the 200 metre breaststroke event. In the 400 metre breaststroke competition, he was disqualified because he touched the wall with only one hand at the second turn.

He was born in Budapest and killed in action in Sianky during World War I.