| Abbreviation | Definition |
|---|---|
| CSPA | Country School Parents Association |
| CSPOA | Constitutional Sheriffs and Peace Officers Association |
| CSRA | Connecticut Street Rod Association |
| CSRA | Council of State Restaurant Associations |
| CSRSA | Canadian Scoring and Risk Strategy Association |
| CSRSA | Corporate Social Responsibility Student Association |
| CSRSA | Credit Scoring and Risk Strategy Association |
| CSSA | California Self Storage Association |
| CSSA | California State Student Association |
| CSSA | Cherokee Senior Softball Association |
| CSSA | Chinese Students and Scholars Association |
| CSSA | Clean and Sober Softball Association |
| CSSA | Colorado State Shooting Association |
| CSSA | Communications Supply Service Association |
| CSSA | Connecticut Science Supervisors Association |
| CSSA | Connecticut State Soccer Association |
| CSTA | Canadian Seed Trade Association |
| CSUA | Computer Science Undergraduate Association |
| CSUA | Copper State Umpires Association |
| CSVA | Collegiate Sports Video Association |