ESA (disambiguation)
- 9950 ESA
- Australian Capital Territory Emergency Services Agency
- Banshenchas
- C1 control code set
- Coverdell Education Savings Account
- East Side Access
- Eastern Sports Association
- Eastern sigillata A
- Ecological Society of America
- Economic Stabilization Agency
- Economics and Statistics Administration
- Education Savings Account
- Eight Schools Association
- El Salvador
- Electronically scanned array
- Electrostatic analyzer
- Emergency Stand Alone
- Emotional support animal
- Employment Standards Act
- Employment and Support Allowance
- Endangered Species Act of 1973
- English Shinty Association
- Entertainment Software Association
- Enthusiast System Architecture
- Entomological Society of America
- Environmental Services Association
- Environmental Station Alpha
- Environmental site assessment
- Environmental systems analysis
- Episcopal School of Acadiana
- Epsilon Sigma Alpha
- Erythropoiesis-stimulating agent
- Esa (name)
- Esha (disambiguation)
- Etobicoke School of the Arts
- European Free Trade Association Surveillance Authority
- European Security Academy
- European Seed Association
- European Sociological Association
- European Space Agency
- European Speedrunner Assembly
- European Supervisory Authority
- European Symposium on Algorithms
- European System of Accounts
- Explicit semantic analysis
- Greek Military Police
- IBM Enterprise Systems Architecture
- Isa (disambiguation)
- Raleigh Entertainment and Sports Arena
- Secret Anti-Communist Army
- Sonex Electric Sport Aircraft
- Èze
- École Sainte-Anne
- École Supérieure des Affaires (Lille)
- École supérieure des affaires (Beirut)