Choi Jung In (최정인; born December 7, 1980) also known mononymously as Jung In (정인), is a South Korean singer under Jungle Entertainment. She started her musical career as an underground R&B vocalist in Daejeon but only made her official debut in 2002, when she appeared as guest artist in Leessang's (리쌍) 2002 album "Rush".

Later on she joined the R&B group G.Fla as their lead vocalist. The group would disband 3 years later with the members leaving to pursue solo careers.

Jung In released her first solo album "정인 From Andromeda" in 2010 and has been active as a solo artist since then.