Konstadinos Stefanopoulos (Greek: Κωνσταντίνος Στεφανόπουλος; born July 11, 1984 in Veroia) is a Greek race walker. He is a four-time national champion for the 50 km race walk. Stefanopoulos represented Greece at the 2008 Summer Olympics in Beijing, where he competed for the men's 50 km race walk. He finished the race in thirty-seventh place by quarter of a minute (25 seconds) ahead of Canadian racewalker Tim Berrett, with a time of 4:07:53.