ESF
- East Sea Fleet
- Education Without Borders (Spanish organization)
- Electro sinter forging
- Emmanuel Schools Foundation
- Empowering Spirits Foundation
- English Schools Foundation
- English Stone Forum
- Entertainment Sports and Fun Camps
- Esler Airfield
- Esperantic Studies Foundation
- Estafeta Carga Aérea
- European School, Frankfurt am Main
- European Science Foundation
- European Services Forum
- European Ski Federation
- European Social Forum
- European Social Fund Plus
- European Softball Federation
- European Squash Federation
- European Studbook Foundation
- Evans Scholars Foundation
- Exatron Stringy Floppy
- Exchange Stabilization Fund
- Expeditionary strike group
- Explosion Suppressant Foam
- Extended superframe
- State University of New York College of Environmental Science and Forestry
- Écoles Sans Frontières