Cornelis van Geelkerken () (19 March 1901 in Sint-Jans-Molenbeek – 29 March 1976 in Ede) was co-founder of the Dutch National Socialist Movement. Cornelis van Geelkerken was born in Sint-Jans-Molenbeek, Belgium. In the 1920s he gravitated toward extreme nationalism. Proposing an authoritarian, anti-democratic movement to Anton Mussert they formed the National Socialist Movement. He became director of their youth corps, the Nationale Jeugdstorm. After the German invasion Geelkerken was appointed Inspector-General of the Nederlandsche Landwacht (home guard set up to combat the Resistance). After the war he was sentenced to life imprisonment but released in 1959. He died on 29 March 1976 in Ede.