Kees Willemen is a Dutch political cartoonist. He established himself in the 1960s and 1970s with cartoons published in student papers from Nijmegen and Groningen. He also made drawings for the socialist publishing house SUN. His comic strip 'Het Volk' was published in the opinion magazine De Nieuwe Linie in 1972-1973. He also made 'Anita' for Boemerang in 1974, and the comic 'Grietje' for the Groninger Universiteitskrant (UK).
Willemen also made drawings for De Waarheid, de soldier's union VVDM, newspaper Trouw and political party Groen-Links. He is still a contributor to the UK, the weekly paper of the University of Groningen, and to Tribune, the magazine of the socialist party SP.