| Acronym | Definition |
|---|
| ECHS | Early College High School |
| ECHS | Extended Chs |
| ECHS | Ex-servicemen Contributory Health Scheme (India) |
| ECHS | Eliot Community Human Services (Lexington, MA) |
| ECHS | El Camino High School (California) |
| ECHS | East Catholic High School |
| ECHS | East Coweta High School (Sharpsburg, Georgia) |
| ECHS | Edison Collegiate High School (Fort Myers, FL) |
| ECHS | Eastside Catholic High School (Washington) |
| ECHS | Extended Cylinder Head Sector |
| ECHS | Elliott County High School (Kentucky) |
| ECHS | Enhanced Cargo Handling System |
| ECHS | East Canton High School (Ohio) |
| ECHS | Eden Central High School (New York) |
| ECHS | Enhanced Cylinders Heads Sectors (computer BIOS) |
| ECHS | East Christian High School (Grand Rapids, Michigan) |