On 1 August 2015, following the death of Jadwiga Młynek (1905–2015), Szubartowicz became the oldest Pole. The older Yisrael Kristal was born in what is now Poland, but moved to Israel after World War II. Szubartowicz's age was certified by the Gerontology Research Group who sent her greetings on her 110th birthday which she celebrated on 16 October 2015.