| Abbreviation | Definition |
|---|---|
| ECRB | Essex County Recovery Bureau |
| ECRC | Eastern Counties Road Car |
| ECRL | Eastern Counties Regional Library |
| ECRU | Eastern Counties Rugby Union |
| ECSD | Elko County School District |
| ECSD | Escambia County School District |
| ECSL | Essex County Soccer League |
| ECTS | Erie County Technical School |
| ECV | Essex County Velo |
| ECWA | Erie County Water Authority |
| EECC | Eastside Ecosystem Coalition Of Counties |
| EFMC | Education Foundation of Martin County |
| EKCBA | East King County Bar Association (Washington) |
| ELCO | Eastern Lebanon County or |
| ELWC | Early Learning Washington County |
| EN | Ekuana County |
| EOC | Eastern Oklahoma County |
| EPCDF | El Paso County Detention Facility |
| ERCC | East Riding County Council |
| ESCC | East Sussex County Council |