Cornelius Claudius Henricus "Kees" van Ierssel (; born 6 December 1945) is a Dutch former footballer who played as a right-back.
During his club career he played for FC Twente from 1969 to 1979. He earned six caps for the Netherlands national team, and was part of the squad that finished as runners-up in the 1974 FIFA World Cup.
FC Twente
Netherlands