SF9 (에스에프나인; shortened from Sensational Feeling 9) is a South Korean boy group formed by FNC Entertainment.SF9 is the company's first dance boy group to debut.SF9 debuted on October 5, 2016 with the release of their first single album, Feeling Sensation.
SF9 was formed from a trainee that participated in FNC Entertainment's survival show "d.o.b (Dance or Band)" against Honeyst. SF9 wins and made their debut with single album "Feeling Sensation". Their title song "Fanfare" debuted at eighth place and peaked at sixth place on the Gaon Album Chart. In 2017, the group released their first mini album "Burning Sensation". In 2018, SF9 made a comeback again with the single "Now or Never".