Located 10 km from Saint-Omer and 30km from Calais, this town is served by the RN43, Gare SNCF-Éperlecques Watten, the D300 / D600 (Tilques / Dunkirk), the A26: St. Omer exit or Nordausques.
Sperliakum, Sprelcke in 1150, Esperlecke in 1300, today Éperlecques, would mean "Spacious valley" because of its topography and its location. Many castles and mansions were built on the territory of Éperlecques. At a place called "the Meullemotte" flukes show the presence of an ancient castle.