Ji In (지인) is a South Korean singer. She was member of the Korean pop girl group Girl's Day but only two months after their debut, on September 12, 2010, it was announced that she (and fellow member Ji Sun) left the group to concentrate on her acting career. In 2014 she re-debuted with the Korean Pop girl group Bebop.
Ji In left Bebop in 2016.
Ji In is now a trot singer under the name Jang Hyeri.