Cor Ruys (Amsterdam, 10 February 1889 – 22 september 1952, Amsterdam) was a Dutch actor, comedian, comedian and stage leader. He played under more "Potasch" in Potasch and Perlemoer by Montague Glass.
In 1905 Rai at the Nederlandsche Tooneelvereeniging by Chris pain. From 1913 he worked at Eduard Verkade and with him he made his first trip to Dutch East Indies. In 1919 went to India, now as Director of Rai again a company. From 1922 to 1924 he was Director of the Princesse theatre to the Hague. In 1924 he was Director of theDutch East Indies Tooneel but also continued to make tours as an actor. In the summers of 1940 to 1943 he was leader of the Kurhaus Cabaret to Scheveningen, and from 1945 until 1952 he was Director of the free Theatre. This company had, along with his brother Anthony Ruys (1892-1955), under the name The Rai Ensemble, founded in 1940.
In addition to comedian, he was a comic actor in improvisation.