SLN

SLN may refer to:
 * SLN (gene), known as Sarcolipin
 * Dutch Sign Language
 * Société Le Nickel, a French mining company
 * Solid lipid nanoparticle
 * Sri Lanka Navy
 * Salina Municipal Airport, Kansas, US, IATA code
 * SYBYL Line Notation for chemical structures
 * Extension for an Asterisk audio file format