| Caulaincourt | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Caulaincourt (Aisne).svg |
| Arrondissement: | Saint-Quentin |
| Canton: | Saint-Quentin-1 |
| Insee: | 02144 |
| Postal Code: | 02490 |
| Mayor: | Raphaël Trouillet[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays du Vermandois |
| Coordinates: | 49.865°N 3.1069°W |
| Elevation M: | 70 |
| Elevation Min M: | 60 |
| Elevation Max M: | 104 |
| Area Km2: | 5.96 |
Caulaincourt (in French pronounced as /kolɛ̃kuʁ/) is a commune in the Aisne department in Hauts-de-France in northern France.