Maria Rheinberger-Schadler (24 May 1883 – 17 May 1988) was centenarian from Liechtenstein and, at the age of 104 years, 359 days, may have been the oldest person ever born in Liechtenstein. She was born in Vaduz on 24 May 1883. Her parents were Dr. Rudolf Schadler and Maria Marxer. On 23 May 1910, she married Egon Rheinberger. The couple had three children. At the time of her death she was the oldest person ever from Liechtenstein, a title she held until 8 September 2017 when she was surpassed by Eduard Alexandrowitsch von Falz-Fein.