| Royaucourt-et-Chailvet | |
| Commune Status: | Commune |
| Arrondissement: | Laon |
| Canton: | Laon-1 |
| Insee: | 02661 |
| Postal Code: | 02000 |
| Mayor: | Guillaume Le Rudulier[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Picardie des Châteaux |
| Coordinates: | 49.5119°N 3.5347°W |
| Elevation M: | 70 |
| Elevation Min M: | 57 |
| Elevation Max M: | 162 |
| Area Km2: | 3.04 |
Royaucourt-et-Chailvet (pronounced as /fr/) is a commune in the Aisne department in Hauts-de-France in northern France.
The river Ailette forms small part of the commune's southern border.