Marcin Kuś (born 2 September 1981 in Warsaw) is a Polish professional footballer (defender) who plays for Cracovia.
Kuś previously played for Korona Kielce, after joining on a free transfer from FC Torpedo Moscow in February 2007. In the 2005/2006 season, Kus spent the second half of the season on loan to the English Coca Cola Championship side Queens Park Rangers, making only 3 appearances.
In July 2008, he joined Turkish Süper Lig side İstanbul Büyükşehir Belediyespor, with whom he played for four years.
Kuś has made seven appearances for the full Poland national football team.