Marcel Matanin (born December 15, 1973 in Vranov nad Toplou) is a long-distance runner from Slovakia, who represented his native country in the men's marathon at the 2004 Summer Olympics in Athens, Greece.
There he finished in 81st and last place, clocking a total time of 2:50:26 hours.
On April 23, 2006 Matanin won the Leipzig Marathon in 2:19:33 hours.