| Sailly-sur-la-Lys | |
| Native Name: | Zelleken |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Sailly-sur-la-Lys.svg |
| Arrondissement: | Béthune |
| Canton: | Beuvry |
| Insee: | 62736 |
| Postal Code: | 62840 |
| Mayor: | Jean-Claude Thorez[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Flandre Lys |
| Coordinates: | 50.6583°N 2.7708°W |
| Elevation M: | 17 |
| Elevation Min M: | 13 |
| Elevation Max M: | 19 |
| Area Km2: | 9.7 |
Sailly-sur-la-Lys (pronounced as /fr/, literally Sailly on the Lys; vls|Zelleken) is a commune in the Pas-de-Calais department in the Hauts-de-France region of France.[2]
Sailly-sur-la-Lys is a large farming and light industrial village situated some 9miles northeast of Béthune and 12miles west northwest of Lille, at the junction of the D945 and D66 roads. The river Lys forms much of the western and northern boundary of the commune.[3]
The prévôté is a fortified building located by the parish cemetery, near the Lys. It includes the remains of the prison and the courts of justice. A chapel dedicated to the Virgin complements the construction. The gateway, which was destroyed in the sixteenth century and rebuilt in 1612, is defended by two towers with mullioned windows. Before the French Revolution, it was the provost that represented the abbot of Saint-Vaast in all matters civil and judicial.
Sailly-sur-la-Lys is twinned with Carnforth, England.