| Neuville-Day | |
| Commune Status: | Commune |
| Arrondissement: | Vouziers |
| Canton: | Attigny |
| Insee: | 08321 |
| Postal Code: | 08130 |
| Mayor: | Bernard Mairien[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Crêtes Préardennaises |
| Coordinates: | 49.4961°N 4.6892°W |
| Elevation M: | 160 |
| Area Km2: | 7.68 |
Neuville-Day (in French pronounced as /nøvil dɛ/) is a commune in the Ardennes department in northern France.