| Rosnoën | |
| Native Name: | Rosloc'hen |
| Commune Status: | Commune |
| Coordinates: | 48.2642°N -4.1933°W |
| Elevation Min M: | 0 |
| Elevation Max M: | 167 |
| Insee: | 29240 |
| Postal Code: | 29590 |
| Arrondissement: | Châteaulin |
| Canton: | Pont-de-Buis-lès-Quimerch |
| Mayor: | Mickaël Kernéis[1] |
| Term: | 2020 - 2026 |
| Area Km2: | 33.70 |
Rosnoën (in French pronounced as /ʁɔsnɔɛn/;) is a commune in the Finistère department of Brittany in north-western France.
Inhabitants of Rosnoën are called in French Rosnoënais.
Rosnoën is located 26km (16miles) southeast of Brest. The village occupies a peninsula between the mouths or the Aulne river and Faou river. Térénez bridge is located between Rosnoën and Landévennec. The bridge crosses the mouth of the Aulne river, connecting Crozon Peninsula to Brittany.