PTFI
| Acronym | Definition |
|---|---|
| PTFI | PT Freeport Indonesia (mining company) |
| PTFI | Philippine Tarsier Foundation, Inc. (est. 1997; Philippines) |
| PTFI | Pilot Trial for Ignition |
| PTFI | Presbyterian Theological Faculty Ireland |
| PTFI | Phil the Funky Instrumentalist (musician) |