Konstantinos "Kostas" Kenteris, also spelled as Konstadinos "Costas" Kederis (Greek: Κωνσταντίνος "Κώστας" Κεντέρης born July 11, 1973) is a Greek former athlete. He won gold medals in the 200 metres at the 2000 Summer Olympics, the 2001 World Championships in Athletics and the 2002 European Championships in Athletics, making him the only European sprinter (along with Linford Christie) to win the gold medal in all three major competitions and the only European World Champion in the 200 metres races. Additionally, he has won two gold, three silver and two bronze medals in the European Cup, as well as three gold medals in the 200 metres at the Athens Grand Prix Tsiklitiria. He is also a 14-time golden medalist at the Greek Athletics Championships and a five-time golden medalist at the Greek Indoor Athletics Championships. He withdrew from the 2004 Summer Olympics, held in his home country, after a doping violation (failed to attend drug test).

Kenteris was named the Greek Male Athlete of the Year three times, for the years 2000, 2001, and 2002. He was named the Best Balkan Athlete of the Year two times, for the years 2000 and 2001.