Houdain is the county town of a canton in the département of Pas-de-Calais (zone 62), district of Béthune, in the north of France. It belongs to agglomeration of the Artois which gathers 58 communes, that is to say 200 000 inhabitants.
Its postal code is 62150
Population (1999): 7,832 inhabitants for the commune and 20,168 inhabitants for the canton.
