Marc Anthony Klok (born 20 April 1993) is a Dutch footballer who plays as a defensive midfielder for PSM Makassar in Liga 1.
Klok began his career at Utrecht.
In 2013, he signed with Scottish Premiership club Ross County.
After one season in Scotland, Klok joined Cherno More Varna where he won one Bulgarian Cup and one Bulgarian Supercup.
After leaving Cherno More at the end of the 2015–16 season, he joined Oldham Athletic.
Klok is the nephew of former De Graafschap, Dunfermline Athletic and Motherwell footballer Rob Matthaei.