CSN may refer to:
CSN is a Crosby, Stills & Nash album released in 1977, the fifth album by the group, the second by the trio configuration and the first without Neil Young since his entry into the band. It peaked at #2 on the Billboard Top Pop Albums chart; two singles taken from the album, Nash's " Just a Song Before I Go" and Stills' "Fair Game" peaked at #7 and #43 respectively on the Billboard Hot 100. It is currently the trio configuration's best selling record, outselling their debut Crosby, Stills & Nash by 200,000 copies. It has been certified for quadruple platinum sales by the RIAA.
CSN is the eleventh album by Crosby, Stills & Nash, issued on Atlantic Records in 1991, not to be confused with the album of the same name released in 1977. A box set on four compact discs, it features material spanning 1968 through 1990 from their catalogue of recordings as a group in addition to selections from Crosby & Nash, Manassas, and their individual solo albums. It peaked at #109 on the Billboard 200, and has been certified platinum by the RIAA. The set is "dedicated to the loving memory of Cass Elliot, without whom most of this music may not have been made."