CSD may refer to:
- Cali Swag District
- California School for the Deaf (disambiguation), several institutions
- Cambridge Structural Database
- Canonical signed digit
- Canteen Stores Department (India)
- Canteen Stores Department (Pakistan)
- Carbonated Soft Drink
- Cat scratch disease
- Central Securities Depository
- Centrale des syndicats démocratiques or Congress of Democratic Trade Unions
- Chartered Society of Designers
- Christopher Street Day
- Circuit Switched Data for mobile phones
- Commission on Sustainable Development
- Communication Service for the Deaf
- Consejo Superior de Deportes, Spanish government agency for sport
- Constant Speed Drive
- Correctional Services Department or Hong Kong Correctional Services
- Corrective Service Diskette, an update for a software program
- Cortical spreading depression
- ČSD or Czechoslovak State Railways
- Serbian dinar's previous ISO 4217 code
- CSD, a file format
- Cavity Sliding Door Abbreviation found on house plans.
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