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 from 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.