| Plougasnou | |
| Native Name: | Breton: Plouganoù |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Plougasnou (Finistère).svg |
| Coordinates: | 48.6964°N -3.7881°W |
| Elevation Min M: | 0 |
| Elevation Max M: | 94 |
| Insee: | 29188 |
| Postal Code: | 29630 |
| Arrondissement: | Morlaix |
| Canton: | Plouigneau |
| Mayor: | Nathalie Bernard[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Morlaix Communauté |
| Area Km2: | 33.94 |
Plougasnou (pronounced as /fr/; br|Plouganoù) is a commune in the Finistère department in Brittany in northwestern France, located about 75 kilometres east of Brest. Plougasnou is northeast of the town of Plouezoc'h, north of Lanmeur and west of Saint-Jean-du-Doigt. It had a population of 3,197 inhabitants in 2016. Inhabitants of Plougasnou are called Plouganistes.
Plougasnou has been twinned with Helston since 2010.[2] [3]