| Beaussais-sur-Mer | |
| Commune Status: | Commune |
| Arrondissement: | Dinan |
| Canton: | Pleslin-Trigavou |
| Insee: | 22209 |
| Postal Code: | 22650 |
| Mayor: | Eugène Caro[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Dinan Agglomération |
| Coordinates: | 48.581°N -2.139°W |
| Area Km2: | 41.65 |
Beaussais-sur-Mer (in French pronounced as /bosɛ syʁ mɛʁ/; Breton: Bosez-Poudour) is a commune in the department of Côtes-d'Armor, western France. The municipality was established on 1 January 2017 by merger of the former communes of Ploubalay (the seat), Plessix-Balisson and Trégon.[2]