FIA (disambiguation)
- Albert Fia
- English language
- FIA
- FIA Card Services
- FIA hair system
- Farnborough International Airshow
- Federal Investigation Agency
- Federated Ironworkers' Association of Australia
- Feline infectious anemia
- Fellow of the Institute of Actuaries
- Fia Backström
- Fire Industry Association
- Fiscal Information Agency
- Flow injection analysis
- Free Iraqi Army
- Freund's incomplete adjuvant
- Friends in Action
- Fusion Industry Association
- Future Imagery Architecture
- Futures Industry Association
- International Federation of Actors
- Maʻafu Fia
- Nobiin language