| Mortefontaine | |
| Commune Status: | Commune |
| Arrondissement: | Soissons |
| Canton: | Vic-sur-Aisne |
| Insee: | 02528 |
| Postal Code: | 02600 |
| Mayor: | Benoît Davin[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 49.3325°N 3.0769°W |
| Elevation M: | 142 |
| Elevation Min M: | 64 |
| Elevation Max M: | 162 |
| Area Km2: | 11.9 |
Mortefontaine (in French pronounced as /mɔʁtəfɔ̃tɛn/) is a commune in the Aisne department in Hauts-de-France in northern France.