Klaus Bugdahl (24 November 1934 – August 2023) was a German cyclist who was active between 1954 and 1978 both on the road and track.

He won the West German National Road Race in 1958.

[1] On track, he won several medals at European championships, mostly in the madison event, and competed in 228 six-day races and won 37 of them, nearly all in his native Germany, which places him as one of the ten most successful racers.

He completed his last six-day race in 1978 in Milan, aged 43.

His racing partners included Eddy Merckx, Patrick Sercu, Rolf Wolfshohl, Rudi Altig, Dieter Kemper and Rik Van Steenbergen.