Kim Jungah (born August 2, 1983), better known by her stage name Jungah or Jung-A, is a South Korean idolsinger. She is the leader, one of the main vocalists, and main dancer of the girl group After School. She debuted with the group in 2009 with the release of their single "New Schoolgirl". It was announced that she would become the new leader in June 2012 following the graduation of the leader, Kahi. She is also a former member of Sz and Kiss Five.
Kim debuted with After School's unofficial first appearance on December 29, 2008 at the SBS Song Festival, performing "Play Girlz" with Son Dambi and Kahi. In the beginning on 2009, a few days before After School's debut, the group released their debut single, "AH!" alongside their EP, New Schoolgirl on 15 January. On 17 January, she and After School made their live debut on MBC's, Music Core. JungAh is now the current Leader, Main Vocalist, and Main Dancer in the group.
On September 2012, it was announced that JungAh has been cast into MBC Every1's drama Reckless Family 2.
On April 7, 2015, Pledis Entertainment announced that JungAh and labelmate Han Dong Geun would be releasing a duet entitled "Between the Two of Us" on April 16.