ESA most commonly refers to the European Space Agency.
ESA or Esa may also refer to:
Places
- El Salvador, IOC country code
- Èze (French pronunciation: [ɛːz], Italian: Eza, Occitan: Esa), a commune in France
People
- Esa (name), list of people with the name
Arts, entertainment, and media
- Esa, daughter of Etain, a character from Irish legend mentioned in the Banshenchas
- Environmental Station Alpha, a video game
Economics and finance
- Coverdell Education Savings Account, an American investment account
- Economic Stabilization Agency, of the Government of the United States; defunct
- Employment and Support Allowance, a British Government state benefit
- Employment Standards Act, of the Parliament of Canada
- European Free Trade Association Surveillance Authority
- European Supervisory Authority in the European System of Financial Supervision
- European System of Accounts
Education
- Education Savings Account, a U.S. designated account to encourage savings to cover future education expenses
- École Sainte-Anne, a French public middle/high school in Fredericton, New Brunswick, Canada
- École supérieure des affaires (Beirut), a Lebanese business school
- École Supérieure des Affaires (Lille), a French business school
- Episcopal School of Acadiana, in Cade, Louisiana, United States
- Etobicoke School of the Arts, in Toronto, Ontario, Canada
- European Security Academy, in Wroclaw, Poland
Professional associations
- Ecological Society of America
- Entertainment Software Association, an American trade association
- Entomological Society of America
- Environmental Services Association, a British professional association
- European Seed Association
- European Sociological Association
Sport
- Eastern Sports Association, a defunct Canadian wrestling promotion
- Eight Schools Association, an American athletic league
- English Shinty Association
- Raleigh Entertainment and Sports Arena, now PNC Arena, in North Carolina, United States
Technology
- Electronically scanned array
- Electrostatic analyzer
- Emergency Stand Alone, a mode of distributed switching in telecommunications
- End of Selected Area, a C1 control code
- Enthusiast System Architecture, a computer bus protocol
- Erythropoiesis-stimulating agent
- Explicit semantic analysis
- IBM Enterprise Systems Architecture, a mainframe instruction set architecture
- Sonex Electric Sport Aircraft, an electric aircraft
- Enhanced suffix arrays; a variant of suffix array
Other uses
- Australian Capital Territory Emergency Services Agency
- East Side Access, a public works project in New York City
- Eastern sigillata A, a type of ancient east Mediterranean pottery
- Emotional support animal
- Endangered Species Act of 1973, of the United States Congress
- Environmental site assessment, for American real estate companies
- Environmental systems analysis, a methodology
- Epsilon Sigma Alpha, an American collegiate and service organization
- European Speedrunner Assembly, a video gaming event
- European Symposium on Algorithms, a computer science conference
- Greek Military Police
- Secret Anti-Communist Army (Spanish: Ejército Secreto Anticomunista), active in the Guatemalan Civil War