Wagner was born in Hermannsburg, Lower Saxony, Germany, on 11 March 1914. At some point, she got married and had at least one daughter, Heidi Robertson. At some point, she moved to the United States with her family.
At the age of 106, she resided at Lincoln Glen Skilled Nursing in San Jose. Before that, she lived independently at Lincoln Glen Manor until December 2018.
Wagner passed away in San Jose, California, USA, on 10 June 2024, at the age of 110 years, 91 days.
Her age was verified by Georg Fürholzer and Marco Wikkerink, in collaboration between the European Supercentenarian Organisation (ESO) and LongeviQuest, and validated on 13 July 2024.
* “LIVING LONGER IN WILLOW GLEN” – The Mercury News, 28 March 2020
* “BIRTHDAY WISHES” – The Mercury News, 13 March 2021
* Hildegard Wagner Obituary – Dignity Memorial