Klaus Viktor Darga (born 24 February 1934) is a German chess grandmaster.

He also proved his strength as a young chess player by sharing first place in the World Junior Championship of 1953, with Oscar Panno of Argentina who was awarded the title on tiebreak.

He came second in the Gijón international tournament in 1956[2].His best performance is held to be the 1967 Winnipeg tournament, where he also tied for first place with Bent Larsen, whom he beat, ahead of joint Boris Spassky and Paul Keres.

He played for West Germany in ten Olympiads between 1954 and 1978, and also served as coach of the German national team.

This biographical article relating to a German chess figure is a stub.