| Marquein | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Marquein 11.svg |
| Arrondissement: | Carcassonne |
| Canton: | La Piège au Razès |
| Insee: | 11218 |
| Postal Code: | 11410 |
| Mayor: | Dominique Dublois[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 43.3061°N 1.7272°W |
| Elevation M: | 250 |
| Elevation Min M: | 210 |
| Elevation Max M: | 311 |
| Area Km2: | 5.49 |
Marquein (in French pronounced as /maʁkɛ̃/; Occitan (post 1500);: Marquènh) is a commune in the Aude department in southern France.