FIIS
| Acronym | Definition |
|---|---|
| FIIS | Fire Island National Seashore (US National Park Service) |
| FIIS | Foreign Institutional Investor |
| FIIS | Fidelity Investments Institutional Services (Fidelity Investments Institutional Operations Company, Inc.) |
| FIIS | Farm Income Insurance Scheme (Department of Agriculture & Cooperation; India) |
| FIIS | Fitzroy Industry and Infrastructure Study (Fitzroy- Rockhampton, Australia) |