| Acronym | Definition |
|---|
| ECG | Electrocardiogram |
| ECG | École en Communication Graphique (French: Graphic Communication School) |
| ECG | École de Commerce et de Gestion (French: Business and Management School; Luxembourg) |
| ECG | Epicatechin Gallate (green tea component) |
| ECG | Engineering Consultants Group (various locations) |
| ECG | European Cyber Games |
| ECG | Electricity Company of Ghana |
| ECG | Electronic Control Gear (fluorescent lighting) |
| ECG | Executive Coaching Group (various locations) |
| ECG | Environmental Chemistry Group (Royal Society of Chemistry) |
| ECG | Enduring Constitutional Government |
| ECG | Electrochemical Grinding |
| ECG | European Contact Group (Prague, Czech Republic) |
| ECG | Electronic Components Group |
| ECG | Embedded and Communications Group (various companies) |
| ECG | Emerald City Gazette (soccer journal) |
| ECG | Employee Consultative Group (various locations) |
| ECG | Ecosystem Conservation Group |
| ECG | Ethnic Channels Group Ltd. (Canada) |
| ECG | En Route Communications Gateway (FAA) |
| ECG | Exercise Control Group |
| ECG | Electronic Combat Group |
| ECG | Elizabeth City Regional Airport (North Carolina) |
| ECG | Emergency Coordination Group |
| ECG | EATMP Communications Gateway |
| ECG | Export Credits Group (Organisation for Economic Co-Operation and Development) |
| ECG | Enbridge Consumers Gas |
| ECG | Electroepitaxial Crystal Growth |
| ECG | Energy Conservation Group (American Society of Mechanical Engineers) |
| ECG | Electronic Communications Gateway (Bell Atlantic) |
| ECG | European Co-operation Grouping |
| ECG | Extras Casting Guild |
| ECG | Eternal Church of God |
| ECG | Ecumenical Church of God |