| Blaise-sous-Arzillières | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Blaise-sous-Arzillières.svg |
| Arrondissement: | Vitry-le-François |
| Canton: | Vitry-le-François-Champagne et Der |
| Insee: | 51066 |
| Postal Code: | 51300 |
| Mayor: | Jacques Fortin[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 48.6725°N 4.5842°W |
| Elevation M: | 105 |
| Area Km2: | 6.89 |
Blaise-sous-Arzillières (pronounced as /fr/, literally Blaise under Arzillières) is a commune of the Marne department in northeastern France.