Resident Identity Card

SL2 may refer to:

• SL2 (musical group), British DJ and dance rave act
• Leicaflex SL2, a Leica mechanical reflex camera favoured by press photographers
• SL2, dirigeable airship List of Schütte-Lanz airships#SL2, used for bombing Warsaw in WWI
• SL2, car in the Saturn S-Series
• SL2 flavivirus, clones in cancer research
• SL2 RNA, a non-coding RNA involved in trans splicing in lower eukaryotes
• SL postcode area, the Slough postal region covering Farnham
• the mathematical structure SL₂(F) special linear group
• special Lie algebra ${𝔰𝔩}_2$ Special linear Lie algebra
• the NASA SL-2 space mission Skylab 2