Konstantine Demetrios "Kosta" Koufos (Greek: Κωνσταντίνος Δημήτριος "Κώστας" Κουφός; born February 24, 1989) is a Greek professional basketball player for CSKA Moscow of the VTB United League and the EuroLeague. Koufos played one season at Ohio State before being selected by the Utah Jazz with the 23rd overall pick in the 2008 NBA draft.
Koufos attended GlenOak High School in Canton, Ohio, where he played center for the GlenOak Golden Eagles high school basketball team. As a junior, Koufos averaged 24 points per game, 11.1 rebounds per game, and four blocked shots per game and he was named Second-Team All-State.
As a senior, Koufos averaged 25.9 points per game, 15.4 rebounds per game and 5.2 blocked shots per game. He was instrumental in GlenOak snapping Canton McKinley's 41-game win streak in January 2007, when he posted 32 points, 19 rebounds and 10 blocks to help the Golden Eagles edge the Bulldogs, 56–55, in overtime. The next day, Koufos recorded 32 points, 15 rebounds and seven blocks against Detroit Country Day, to lead GlenOak to its ninth consecutive victory.