Jaeyoon (재윤), alternatively spelled as Jaeyun, may refer to:
- People
- Jaeyun of 8TURN, former BOYS24 and MIXNINE contestant
- Jaeyun of ODD ONE OUT
- Jaeyun of PIERCE
- Jae Yoon of SF9
- Jung Jae Yoon of Solid
- Jae Yun (currently known as Jayn Lee) of TO1
- Jaeyoon, former member of ChoColat
- Jaeyoon, former trainee of DPOP Friends
- Song Jaeyoon, former member of J'Heart
- Jaeyoon, former member of Twilight and 20star