Stefania "Stefa" Wilczyńska (26 May 1886 – 6 August 1942) was a Polish educator who was murdered in the Holocaust. She was born into a wealthy Jewish family in Warsaw, trained as a teacher and was educated at the University of Liège in Belgium and the University of Geneva in Switzerland. She returned to Warsaw and worked at a Jewish orphanage, later becoming its director. She met Dr. Janusz Korczak in 1909 and went to work at his Jewish orphanage. Besides looking after the day-to-day operation of the orphanage, she also organized fundraising activities in support of the orphanage. During World War I, Korczak was called up for military service and Wilczyńska had to manage the orphanage by herself.