Lee Ga-hyun
- Birthday: 1999-02-03
- Place of birth: Seongnam, North Gyeonggi Province, South Korea
- Also know as: Gahyeon
Gahyun (Korean: 가현; Japanese: ガヒョン; formerly romanized as Gahyeon) is a South Korean singer and rapper under Dreamcatcher Company. She is the maknae of the girl group Dreamcatcher.
