Park Cho-a (Korean: 박초아; born March 6, 1990), known mononymously as Choa (stylized as ChoA), is a South Korean singer. She is best known as a former member of the girl group AOA.

Choa was born on March 6, 1990, in Incheon, South Korea. She wanted to major in music at university but her conservative father wanted her to get a traditional job, so she enrolled in Aviation Business Administration in Inha Technical College. She also worked as an IPTV salesperson, where she secretly auditioned to be an idol, failing the audition at SM Entertainment 15 times.

Choa's first step in becoming an idol was when she met singer-songwriter Juniel, who told her about FNC's auditions for their girl group, AOA. Both Juniel and Choa were previously trainees at a company that went bankrupt.

On July 30, 2012, Choa made her debut as a member of AOA on Mnet's M Countdown with the song "Elvis" from their debut single album, Angels' Story.

On June 12, 2013, it was announced that Choa would play the female lead, Gabriella, in the musical High School Musical. Her agency, FNC Entertainment, revealed photos of Choa practising the duet song, "Start of Something New". Choa said that she wanted to portray Gabriella as sincerely as she could. The musical ran from July 2 to September 1 at Seoul's Blue Square Samsung Card Hall.^{[unreliable source?]}

On March 16, 2014, Choa released a solo OST for TV Chosun's TV series Bride of the Century.^{[unreliable source?]}

Choa appeared as a new cast member on MBC's variety show "My Little Television". She later left the show on May 19, 2015.^{[unreliable source?]}

Choa also became a new model for sports brand NBA's 2015 S/S, the first few pictures released were colourful and sporty.^{[unreliable source?]}