FISA may refer to:

  • Foreign Intelligence Surveillance Act, a statute in the United States
    • Foreign Intelligence Surveillance Act of 1978 Amendments Act of 2008 to the act
  • Fédération Internationale des Sociétés Aérophilatéliques or International Federation of Aerophilatelic Societies
  • Fédération Internationale des Sociétés d'Aviron or the International Federation of Rowing Associations, the governing body for international rowing
  • Fédération Internationale du Sport Automobile, historically a subsidiary body of the FIA
  • Federation of Irish Scout Associations, a member of the World Organisation of the Scout Movement
  • Fighting Internet and Wireless Spam Act (Bill C-28), Canadian anti-spam legislation
  • Fibras Industriales S.A., a fishing net, rope, twine, float and pp bag manufacturer in Lima, Peru
  • Federation of Indian Student Associations in Australia, an umbrella body of Indian Students Associations in Australia