| Longueil-Sainte-Marie | |
| Commune Status: | Commune |
| Arrondissement: | Compiègne |
| Canton: | Estrées-Saint-Denis |
| Insee: | 60369 |
| Postal Code: | 60126 |
| Mayor: | Stanislas Barthelemy[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Plaine d'Estrées |
| Coordinates: | 49.3575°N 2.7186°W |
| Elevation Min M: | 28 |
| Elevation Max M: | 129 |
| Area Km2: | 17 |
Longueil-Sainte-Marie (pronounced as /fr/) is a commune in the Oise department in northern France.