Haisnes is a commune in the Pas-de-Calais department in the Nord-Pas-de-Calais region of France.
Haisnes is a former coalmining town, now a light industrial and farming commune, situated some 9 miles (14.5 km) east of Béthune and 16 miles (25.7 km) southwest of Lille, at the junction of the D163 and the D947 roads.