Peter Blachstein (30 April 1911 – 4 October 1977) was a German journalist who became a politician. During the middle 1930s he spent time in the Hohnstein Concentration Camp, but he was released and participated in the Spanish Civil War on the anti-fascist side. The rest of the Nazi years he spent outside Germany, mostly in Norway and Sweden. Following the restoration of diplomatic relations between West Germany and Yugoslavia, in 1968 he became West Germany's ambassador in Belgrade.