John C. G. Röhl (born 31 May 1938) is a British historian.
John Charles Gerald Röhl was born in the German Hospital in Dalston, east London, on 31 May 1938 to a German father, Dr. Hans-Gerhard Röhl, and an English mother, Freda Kingsford Woulfe-Brenan. She was the daughter of Captain Frederick Woulfe-Brenan, the Labour candidate standing against Lady Astor in the Plymouth Sutton constituency in the general elections of 1922, 1923 and 1924, and of Saffie Beechey Kingsford, great granddaughter of the Georgian portrait painter Sir William Beechey.
At the outbreak of war in 1939, John Röhl was taken by his parents first to Forst on the River Neisse in eastern Germany and then to Pécs in southern Hungary. His first languages were Hungarian and German. After the arrest of his father by the SS in late July 1944 the family moved to the relative safety of the remote Hungarian countryside, but in January 1945 with the imminent approach of the Red Army, Freda Röhl and her by then three children joined the stream of refugees heading westwards back to Germany. They were eventually reunited with Gerhard Röhl, who had been conscripted into a punishment battalion on the Russian front, in Ziegenrück in Thuringia, where they were liberated by the US Army led by General George S. Patton.
After the Potsdam Conference the Americans offered the family safe passage from the Soviet Zone of Occupation to their headquarters in Frankfurt-am-Main, where Gerhard Röhl became an interpreter and later the headmaster of the Helmholtz-Gymnasium, a large grammar school for boys. Freda Röhl returned to England with her two daughters in December 1945; John Röhl was sent under the auspices of the Red Cross to an international children's home in Adelboden, Switzerland. He was reunited with his mother and sisters in Manchester in December 1946.