| Tréflaouénan | |
| Native Name: | Trelaouenan |
| Commune Status: | Commune |
| Coordinates: | 48.6286°N -4.095°W |
| Elevation Min M: | 19 |
| Elevation Max M: | 96 |
| Insee: | 29285 |
| Postal Code: | 29440 |
| Arrondissement: | Morlaix |
| Canton: | Saint-Pol-de-Léon |
| Mayor: | Jacques Pontu[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Haut-Léon Communauté |
| Area Km2: | 8.16 |
Tréflaouénan (in French pronounced as /tʁeflawenɑ̃/; Breton: Trelaouenan) is a commune in the Finistère department of Brittany in north-western France.
Inhabitants of Tréflaouénan are called in French Tréflaouénanais.