| Saint-Vaast-de-Longmont | |
| Commune Status: | Commune |
| Arrondissement: | Senlis |
| Canton: | Crépy-en-Valois |
| Insee: | 60600 |
| Postal Code: | 60410 |
| Mayor: | Gilbert Bouteille[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Région de Compiègne et Basse Automne |
| Coordinates: | 49.3036°N 2.7369°W |
| Elevation M: | 45 |
| Elevation Min M: | 34 |
| Elevation Max M: | 126 |
| Area Km2: | 4.9 |
Saint-Vaast-de-Longmont (in French pronounced as /sɛ̃ va(st) də lɔ̃mɔ̃/) is a commune in the Oise department in northern France.[2]