Byun is a Korean surname. Notable people with the surname include:
Byun Baek-hyun, South Korean singer, of Chinese-South Korean band Exo (band), and actor
Byun Byung-joo, South Korean football player
Byun Chun-sa, South Korean short track speed skater
Byun Eun-jong, retired StarCraft pro gamer and poker player from South Korea
Byun Hee-bong, South Korean actor
Byun Ho-young, South Korean football player
Byun Hye-young, South Korean former swimmer
Byun Jae-sub, South Korean footballer
Byun Jang-ho, South Korean film director
Byun Ji-hyun, South Korean figure skater
Byun Jung-ilj, former South Korean boxer
Byun Jung-soo, South Korean model and actress
Byun Se-jong, South Korean figure skater
Byun Sung-hwan, South Korean retired footballer
Byun Woong, South Korean footballer
Byun Yo-han, South Korean actor
Byun Young-joo, South Korean film director
Byun Young-jun, South Korean racewalker