Nguyễn Quốc Huân (born October 2, 1981 in Hanoi) is a Vietnamese taekwondo practitioner, who competed in the men's flyweight category.

[1] He claimed a silver medal in the 58-kg division at the 2005 Southeast Asian Games in Manila, Philippines, and finished fifth at the 2004 Summer Olympics, representing his nation Vietnam.

[3] Nguyen qualified for the Vietnamese squad in the men's flyweight class (58 kg) at the 2004 Summer Olympics in Athens, by granting a berth and placing fifth from the Asian Olympic Qualifying Tournament in Bangkok, Thailand.

[4][5] Nguyen edged past Russia's Seyfula Magomedov in his opening match 12–10, and then yielded a startling 4–2 victory over his British opponent Paul Green in the quarterfinals.

[6] Fighting against his Mexico's Óscar Salazar in the semifinals, Nguyen had collected a knee injury which his Mexican opponent ruthlessly exploited and ended the match in a painful 0–8 defeat.