CSN may refer to:
Companies CSN Stores, former name of Wayfair, American e-commerce company CSN International (Christian Satellite Network), religious radio broadcaster based on radio station KAWZ in Twin Falls, Idaho Centrala Studiestödsnämnden, Swedish national student loans and grants authority Columbus Sports Network (WCSN-LD), low-power television station in Columbus, Ohio Comcast SportsNet, former name of NBC Sports Regional Networks Comic Shop News, free weekly newspaper distributed throughout comic book specialty stores Companhia Siderúrgica Nacional, Brazilian steel maker
Music Crosby, Stills & Nash, an American folk rock supergroup CSN (album), 1977 CSN (box set), 1991
Transport CSN, National Rail station code for Chessington North railway station, England Changsha South railway station, China Railway pinyin code CSN China Southern Airlines, China Chalisgaon Junction railway station (station code: CSN), Maharashtra, India
Other uses Canaan Smith-Njigba (born 1999), American baseball player Cell Signaling Networks COP9 signalosome (CSN), a protein complex CSN2 COP9 signalosome complex subunit 3 (CSN3) Coláiste an Spioraid Naoimh, a secondary school in Cork City, Ireland College of Southern Nevada, a community college located in Clark County Comunidad Sudamericana de Naciones, Union of South American Nations CSN.1, Concrete Syntax Notation, a telecommunications and computer networking standard Confederate States Navy Confédération des syndicats nationaux Corporate Sponsored Nominee, in the UK, a shareholder intermediary allowing shares to be held digitally without certificates Carlton Sports Network, a sports channel in Sri Lanka Czech technical standard (ČSN)