9S

9S may refer to :
* 9S (light novels), a Japanese light novel sries by author Tohru Hayama and illustrator Yamato Yamamoto published in "Dengeki hp" magazine and under the "Dengeki Bunko" imprint
* Southern Air IATA airline designator

9s refers to a number of rugby league nines tournaments :
* Lezignan 9s,
* Middlesex 9s,
* Midlands 9s,
* Veneto 9s,
* York International 9s