J
Jeong Ji-yoon
- Born
- 15 September 2000 (26 years)
- Place of birth
- South Korea
- Gender
- Female
Jiyoon (Korean: 정지윤; Chinese: 鄭智赟; Japanese: チョン・ジユン) is a South Korean singer under KM Entertainment. She is a member of the girl group ICHILLIN'. She is also a former trainee of Polaris Junior. She is best known for participating in Mnet's reality survival show Girls Planet 999.