ECCC
- East Central Community College
- Eastern Collegiate Cycling Conference
- Electronic Colloquium on Computational Complexity
- Electronic Commerce Council of Canada
- Emerald City Comic Con
- Environment and Climate Change Canada
- Essex County Cricket Club
- European Champion Clubs Cup (athletics)
- European Chess Club Cup
- European Club Cup of Champions
- European Cybersecurity Competence Centre
- Evangelical Christian Church in Canada
- Extraordinary Chambers in the Courts of Cambodia
- Taiwan–Hong Kong Economic and Cultural Co-operation Council