| Trefcon | |
| Commune Status: | Commune |
| Arrondissement: | Saint-Quentin |
| Canton: | Saint-Quentin-1 |
| Insee: | 02747 |
| Postal Code: | 02490 |
| Mayor: | Véronique Rozier[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays du Vermandois |
| Coordinates: | 49.8586°N 3.0961°W |
| Elevation M: | 100 |
| Elevation Min M: | 61 |
| Elevation Max M: | 98 |
| Area Km2: | 4.02 |
Trefcon (pronounced as /fr/) is a commune in the Aisne department in Hauts-de-France in northern France.
An old alternative name was Saint-Martin-des-Prés.[2] Named after the old ruined church of the same name.[3]