Younha (Korean: 고윤하; Hanja: 高允河 Go Yoon Ha Japanese: ユンナ Yunna), born 29 April 1988 in Seoul, Korea, is a Korean pop singer.

Younha made her debut at the age of sixteen. Nicknamed the "Oricon comet" for her success in Japan, she has currently released eight singles and one album in that country with varying degrees of success. Also, many of her songs have been featured in TV shows.

Younha was signed to Epic Records, a branch of Sony Music Entertainment Japan, from 2004 to 2008. She then moved to Sistus Records, a Geneon Entertainment label. In South Korea, she is signed to Lion Media and Stam Entertainment.