Leffinge, sometimes Leffingen in English, is a historic village in Belgium, now part of the municipality of Middelkerke, province of West Flanders.
In 1137 the castellan of Saint-Omer confirmed the gift of the church in Leffinge to the Knights Templar. The medieval church was damaged in 1488, repaired around 1500, and demolished in 1857. The current neo-Gothic church was built 1877-1879 and restored in 1983.
A preliminary action of the Battle of Nieuwpoort (1600) was fought in Leffinge, in which Scottish mercenaries in Dutch service particularly distinguished themselves.
Coordinates: 51°11′N 2°53′E / 51.183°N 2.883°E