Karl Gröger (7 February 1918 - 1 July 1943) was a member of a Dutch resistance group executed in 1943.
In 1943 the SS and police court sentenced him to death in Den Haag.
In collaboration with a Dutch resistance group, he destroyed the registration of address office of Amsterdam, thereby destroying file cards of Dutch people which would have faced forced labour and deportation to concentration camps.
He was given the title "Righteous Among the Nations" in 1986 by Yad Vashem.