Stefan Ciołkowski (20 April 1908 – 7 June 1970) was a Polish trade unionist and communist activist.
Born in Lublin, Ciołkowski became a miner and joined the Communist Party of Poland.
There, he joined the Communist Party of Belgium (PCB), and formed a mutual aid association for Poles.
[1] On the outbreak of World War II, Ciołkowski returned to France, where he was active in the communist resistance.
In October 1945, the PCF sent him to Belgium, where he served on the central committee of the PCB, with responsibility for organising the party among emigrant workers.