Walter Kämpf (12 September 1920 – 2 November 1943) was an Austrian anti-Nazi activist. He became a resistance member when he was still in Vienna. Following his conscription in 1939 he was also a soldier. He was subsequently suspected of "spying" and convicted by a military court. His death sentence was carried out using the guillotine that had been installed at the , soon after the incorporation of Austria into an expanding German state.