EWSC
| Acronym | Definition |
|---|---|
| EWSC | Essen-Werdener Segel-Club (German: Essen Werden Sailing Club) |
| EWSC | East West Securities Co. (San Francisco, CA) |
| EWSC | Eastern Wisconsin Stock Car (Plymouth, WI) |
| EWSC | East Washington School Corporation (Perkin, IN) |
| EWSC | Excess Water Storage Capacity |