Haein (해인), alternatively stylized as Hein, may refer to:
- Artists
- Lee Hae In, a soloist and former member of I.B.I
- Som Hein (currently known as Som Hevin), a soloist singer and former Idol School contestant
- People
- Haein, former pre-debut member of B-OURS
- Haein, former member of Gangkiz
- Haein, former member of IRION Girls
- Haein of LABOUM
- Shin Hae In, former LOUD contestant