Gayoon
- Full/Birth Name:
- Heo Ga Yoon
- Korean Name:
- 허가윤
- Group:
- 4Minute
- Position:
- Main Vocalist
- Birthday:
- May 18, 1990 (35 years old)
- Height:
- 165 cm (5ft 5in)
- Weight:
- 47 kg (104 lbs)
- Stan Rank:
- 136th
- Origin:
- South Korea
Gayoon was the main vocalist of 4Minute. She was praised for her powerful vocals and emotional singing.