JSL

JSL may refer to:
 * JSL, Joint Station LAN, International Space Station
 * JSL S.A., a Brazilian logistic company
 * Japanese: The Spoken Language, a Japanese textbook
 * JSL romanization, the romanization system used in the text
 * Jamaican Sign Language
 * Japanese Sign Language (ISO 639-3: jsl)
 * Japan Soccer League
 * JMP Scripting Language, a programming language used in the JMP statistical software
 * Jonathan Stuart Leibowitz, given name of comedian Jon Stewart
 * Journal of Symbolic Logic
 * Le Journal de Saône-et-Loire, a French daily newspaper
 * Luxembourg Socialist Youths (French: Jeunesses Socialistes Luxembourgeoises), a political youth organization