Walter Klingenbeck (30 March 1924, in Munich – 5 August 1943, in Munich-Stadelheim) was a German resistance fighter in the time of the Third Reich.
Early in 1941, a number of young people with similar political and religious views formed a group under Klingenbeck's leadership.
They planned to spread leaflets and built a radio transmitter through which they broadcast opposition propaganda, and called for the overthrow of the Nazi regime.
Two of his friends, Hans Haberl and Daniel von Recklinghausen, were at first also condemned, but on 2 August 1943, their sentences were commuted to eight years at hard labour in a Zuchthaus.
In January 1998, a formerly unnamed lane in Maxvorstadt, a neighbourhood in the center of Munich, was named for Klingenbeck.