Leforest is a chief town of a canton of northern France, in the département of Pas-de-Calais (zone 62), arrondissement of Lens. It belongs to the agglomeration of Hénin-Carvin which gathers 14 communes, that is to say 125,000 inhabitants.
Its postal code is 62790.
Population (1999): 6,776 inhabitants for the city and 23,272 inhabitants for the canton.
