Cornelis "Kees" Staf (23 April 1905 – 10 September 1973) was a Dutch politician of the defunct Christian Historical Union (CHU) party now merged into the Christian Democratic Appeal (CDA) party and businessman.
Staf worked as student researcher at the National Agricultural and Forestry College from June 1926 until July 1928. Staf served in the Royal Netherlands East Indies Army as a Sergeant in the Corps of Engineers stationed in Sawah Besar from December 1928 until December 1929. Staf worked for the land reclamation Dutch Heidemaatschappij Company from December 1929 until January 1941 and served as CEO and Chairman of the board of directors from November 1939 until May 1941 and he also worked as a civil servant for the province of Gelderland from August 1939 until May 1940.
On 24 January 1951 the Cabinet Drees–Van Schaik fell and continued to serve in a demissionary capacity until the cabinet formation of 1951 when it was replaced by the Cabinet Drees I with Staf appointed as Minist