Cooper Flagg (born December 21, 2006)[1] is an American college basketball player for the Duke Blue Devils of the Atlantic Coast Conference (ACC).

Flagg won multiple national high school player of the year honors as a senior and was ranked the top recruit in the 2024 class.

[6] Prior to the beginning of his first year at the school, he played in the Nike Elite Youth Basketball League (EYBL) for the Florida Eagles, an Amateur Athletic Union team affiliated with Montverde.

[7][8] Flagg was named the MVP of the 2023 Hoophall Classic after scoring 21 points with five steals, five rebounds, and three assists in Montverde's 85–63 victory over La Lumiere Academy.

[11] After the season, he played for Maine United in the EYBL and averaged 25.4 points, 13 rebounds, 5.7 assists, and 6.9 blocks in seven games at the Peach Jam tournament.

[30] He made his college basketball debut during Duke's season opener against Maine on November 4, 2024, and scored 18 points with seven rebounds, five assists, and three steals in a 96-62 win.

[35] He was named to the All-Tournament Team after averaging 9.3 points, 10 rebounds, 2.9 blocked shots, and 2.4 steals per game as the United States won the gold medal.

[37] He was named the 2022 USA Basketball Male Athlete of the Year for his performance in the Under-17 World Cup and is the youngest player to win the award.

[43] Flagg has a fraternal twin brother, Ace, who was a teammate at Nokomis, transferred to Montverde,[44] and has since verbally committed to play at Maine starting in 2025–26.