| Cernay-en-Dormois | |
| Commune Status: | Commune |
| Arrondissement: | Châlons-en-Champagne |
| Canton: | Argonne Suippe et Vesle |
| Insee: | 51104 |
| Postal Code: | 51800 |
| Mayor: | Jean-Pierre Chapron[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 49.2269°N 4.7672°W |
| Elevation M: | 128 |
| Area Km2: | 24.82 |
Cernay-en-Dormois (in French pronounced as /sɛʁnɛ ɑ̃ dɔʁmwa/) is a commune in the Marne department in north-eastern France.