Olga Horak (born 1926; née Rosenberger) is a Czechoslovakian-born Australian author and Holocaust survivor. Born in 1926 in Bratislava in what was then Czechoslovakia to Piroska (née Weiss; 1905–1945) and Hugo Rosenberger (1894–1944), she was transported by the Nazis to Auschwitz in 1944 and later, in early January 1945, aged 17, to Bergen-Belsen. She was the sole survivor of her family. Her sister, Judith (1925–1942) was murdered in Auschwitz in 1942. Her father was transported to Auschwitz in 1944 and her mother died the day after Belsen was liberated by the British on 15 April 1945. She and her husband John Horak emigrated to Australia in 1949 and established Hibodress, a garment business. In 2000, she published her memoir, Auschwitz to Australia.