JSL

JSL may refer to:
 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
 JSL Singh (active from 2001), Indian music director and singer
Le Journal de Saône-et-Loire, a French daily newspaper
 Luxembourg Socialist Youths (French: ), a political youth organization