John Chillag (April 20, 1927 – March 21, 2009) was an Austrian Holocaust survivor and author. Born in Vienna, he fled with his family to Hungary in 1934 to avoid Nazi Germany's expanding sphere of influence, however during the German occupation of Hungary in 1944 he and his family were placed in a 5,000 strong Jewish ghetto in Győr, then taken to Auschwitz. Between 30 and 60 relatives died there, including his Czechoslovakian-born mother, however he and his father were selected for manual labour and taken to Bochum to work for Bouchumer Verein, a steel plant. His father died there in 1945, and Chillag was force-marched to Buchenwald concentration camp where he was liberated by the Allies two weeks later and given medical treatment.