CSY
| Acronym | Definition |
|---|---|
| CSY | Client System |
| CSY | Cheboksary (Russia) |
| CSY | Can't Stop Yawning |
| CSY | Caribbean Sailing Yachts (sailboats) |
| CSY | Cross-Sectoral Youth (project; USAID) |
| CSY | Community Services YMCA (Young Men's Christian Association; Cincinnati, OH) |
| CSY | Caledon Ship Yard Ltd. |