Oscar Tietz (18 April 1858 – 17 January 1923) was a Jewish-German businessman (Unternehmer).
He was born in Birnbaum/Warthe, Posen, Kingdom of Prussia. The brother of Leonhard Tietz, and a nephew of Hermann Tietz, he joined his uncle's department store concern, in Berlin, Tietz Department Store (Elberfeld).[1][2]
When the Nazis came to power the departments stores the Tietz founded were Aryanized, that is forcibly transferred to non-Jewish owners.[4] The Tietz department stores became part of Hertie, KaDeWe.[5][6]
Postwar claims were filed by the Tietz family concerning the expropriation of property under the Nazis.[7]