A village, located 9 miles (15 km) west of Saint-Omer, at the D225 and D208 crossroads.
Seven hamlets are found within the commune: Le val d'Acquin, Lauwerdal, Nordal, Le Poovre, Westbécourt, Merzoil et and La Wattine.
A large national nature reserve has been created in the area, of great ecological interest.[4]
History
First mentioned by the name of "Atcona" in the 10th century.
Acquin and Westbécourt were joined as a single commune on 1 January 1974.