ECSB
| Acronym | Definition |
|---|---|
| ECSB | East Cambridge Savings Bank (Cambridge, MA) |
| ECSB | European Council for Small Business |
| ECSB | Étude Charpente et Structure Bois (French: Carpentry and Wood Structure Study) |
| ECSB | Edmonton Catholic School Board (Edmonton, Alberta, Canada) |
| ECSB | Electronic Commerce Standards Board (Computing Technology Industry Association) |
| ECSB | Entente Charnècles St-Blaise (French table tennis club) |
| ECSB | Early Childhood Services Bureau (Montana) |