Byeon, also known as Byun, Pyon (변) is a Korean surname. Notable people with the surname include:
- Byeon Chang-heum, South Korean educator
- Byeon Hyo-mun, Joseon diplomat
- Byeon Jin-su, South Korean baseball player
- Byeon Jun-byum, South Korean football player
- Byeon Sang-byeok, Joseon painter
- Byeon Sang-su, South Korean canoeist
- Byeon Sung-wan, South Korean politician
- Byeon Woo-seok, South Korean actor
- Byeon Yeong-ro, South Korean poet
- Byeon Yeong-tae, South Korean politician
- Byun Baek-hyun, South Korean singer and actor, member of boy band Exo
- Byun Byung-joo, South Korean football player
- Byun Chun-sa, South Korean short track speed skater
- Byun Eun-jong, South Korean retired StarCraft pro gamer and poker player
- 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
- Pyon In-son, North Korean politician
- Pyon Kwang-sun, North Korean artistic gymnast
- Pyon Rye-yong, North Korean artistic gymnast
- Pyon Yong-rip, North Korean politician