| Sercus | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Sercus (Nord).svg |
| Arrondissement: | Dunkerque |
| Canton: | Hazebrouck |
| Insee: | 59568 |
| Postal Code: | 59173 |
| Mayor: | Stéphanie Fenet[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Flandre Intérieure |
| Coordinates: | 50.7081°N 2.4569°W |
| Elevation M: | 45 |
| Elevation Min M: | 41 |
| Elevation Max M: | 70 |
| Area Km2: | 4.98 |
| Demonym: | Sercusiens |
Sercus (in French pronounced as /sɛʁky/; Dutch; Flemish: Zerkel) is a commune in the Nord department in northern France.[2]
In the past, Sercus was on a Roman road that went went from Cassel to Aire-sur-la-Lys, going through Oxelaëre, Staple, Wallon-Cappel, Thiennes and from Aire-sur-la-Lys continued towards Amiens via Saint-Pol-sur-Ternoise and Doullens.[3]
During the Ancien Régime, the parish was included in the former Diocese of Thérouanne, and after it was abolished in 1557, the parish was transferred to the Diocese of Saint-Omer.[4]