| Acronym | Meaning |
| FIA | Fallen in Action (obsolete) |
| FIA | Family Investment Administration |
| FIA | Farm Income Averaging |
| FIA | Federal Insurance Administration |
| FIA | Federal Investigation Agency (Pakistan) |
| FIA | Federal Investigation Authority (Pakistan) |
| FIA | First in America |
| FiA | Fisheries Administration (Cambodia) |
| FIA | Flanders International Airport (Belgium) |
| FIA | Force Integration Analysis |
| FIA | Freedom of Information Act |
| FIA | Functional Interface Activity |
| FIA | Functional Interoperability Architecture (US DoD) |
| FIA | Fundação para a Infância e Adolescência (Portugese: Foundation for Infancy and Adolescence) |
| FIA | Funds-In Agreement |
| FIA | Future Imagery Architecture |
| FIA | Future Internet Architecture (US NSF) |