ESF

• Écoles Sans Frontières, a French educational charity
• Education Without Borders (Spanish organization) (Spanish: {{lang|es|Educación Sin Fronteras}}), a Spanish educational charity
• Emmanuel Schools Foundation, a British educational charity
• English Schools Foundation, an organization of twenty two international schools in Hong Kong
• Esperantic Studies Foundation, a Canadian Esperanto organization
• European School, Frankfurt am Main, in Germany
• Evans Scholars Foundation, an American scholarship program
• State University of New York College of Environmental Science and Forestry, in Syracuse, New York, United States

• European Science Foundation, a research organization
• European Studbook Foundation, studbooks of reptiles and amphibians in captivity
• Electro sinter forging
• Extended superframe
• Exatron Stringy Floppy, an 8-bit computer peripheral
• Explosion Suppressant Foam, used to protect from fire in aircraft wings

• East Sea Fleet, of the Chinese People's Liberation Army Navy
• Empowering Spirits Foundation, an American LGBT rights organization
• English Stone Forum, a British conservation organization
• Entertainment Sports and Fun Camps (ESF), network of day camps
• Esler Airfield, in Louisiana, United States
• Estafeta Carga Aérea, a Mexican airline
• European Services Forum, a lobby group
• European Social Forum, a conference series
• European Social Fund of the European Union, currently European Social Fund Plus
• European Softball Federation
• European Ski Federation
• European Squash Federation
• Exchange Stabilization Fund, of the United States Treasury Department
• Expeditionary strike group in the United States Navy

{{disambiguation}}