| Abbreviation | Definition |
|---|---|
| CLNHA | Crater Lake Natural History Association (est. 1942) |
| CLOA | Cedar Lake Owners Association |
| CLOA | Chief Leisure Officers Association |
| CLOA | Cultural Leisure Officers Association |
| CLPA | CC Link Partner Association |
| CLPA | Chetek Lakes Protection Association |
| CLPA | China Law and Policy Association |
| CLPOA | Canyon Lake Property Owners Association (Canyon Lake, CA) |
| CLPOA | Choctaw Lake Property Owners Association (Ohio) |
| CLRA | Construction Labour Relations Association |
| CLSA | California Life Sciences Association |
| CLSA | Canadian Laboratory Suppliers Association |
| CLSA | Caribbean Law Student Association |
| CLSA | Caribbean Law Students Association |
| CLSA | Chicanx Latinx Staff Association |
| CLSA | Cornell Law Students Association |
| CLSA | Cowan Lake Sailing Association |
| CLTASA | Chinese Language Teachers Association of South Australia |
| CMA | California Medical Association |
| CMA | Commonwealth Medical Association |