''S'' may refer to:
* ''LightNovel/{{Esu}}'', known in the US as ''S'', a BoysLoveGenre LightNovel series by Saki Aida and Chihara Nada.
* ''Manga/{{S}}'', a {{shoujo}} tennis manga by Setona Mizushiro.
* ''Literature/{{S}}.'', a novel by John Updike.
* ''[[{{Literature/SDorst}} S]]'', a novel told via marginal notes in another novel, by Creator/JJAbrams and DougDorst.
* ''Music/{{S}}'', a short-lived K-Pop group.
* The page on [[OneLetterTitle One-Letter Titles]].