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)