| Tréglonou | |
| Native Name: | Treglonoù |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Tréglonou (Finistère).svg |
| Coordinates: | 48.5514°N -4.5389°W |
| Elevation Min M: | 0 |
| Elevation Max M: | 67 |
| Insee: | 29290 |
| Postal Code: | 29870 |
| Arrondissement: | Brest |
| Canton: | Plabennec |
| Mayor: | Guy Taloc[1] |
| Term: | 2020 - 2026 |
| Area Km2: | 5.85 |
Tréglonou (in French pronounced as /tʁeɡlɔnu/;) is a commune in the Finistère department of Brittany in north-western France.
Inhabitants of Tréglonou are called in French Tréglonousiens.