| Mareilles | |
| Commune Status: | Commune |
| Arrondissement: | Chaumont |
| Canton: | Bologne |
| Insee: | 52313 |
| Postal Code: | 52700 |
| Mayor: | Luc Vautrin[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Meuse Rognon |
| Coordinates: | 48.184°N 5.264°W |
| Elevation M: | 348 |
| Area Km2: | 22.28 |
Mareilles (in French pronounced as /maʁɛj/) is a commune in the Haute-Marne department in north-eastern France.