ECOSA
| Acronym | Definition |
|---|---|
| ECOSA | European Consumer Safety Association |
| ECOSA | European Calcium Organic Stabilisers Association (industrial chemistry) |
| ECOSA | East Central Ontario Soccer Association (Ontario, Canada) |
| ECOSA | Education and Communication for Sustainability in Africa (environmental education survey) |
| ECOSA | European Conference on Optical Systems and Applications (physics) |
| ECOSA | Erindale Coptic Orthodox Students Association (University of Canada) |