Houlle is a commune of France, in the département of Pas-de-Calais (zone 62), the arrondissement of Saint-Omer, and the canton of Saint-Omer-nord. It belongs to the agglomeration of Saint-Omer which includes 19 communes, with a total of 65,000 inhabitants.
Its postal code is 62910
Population (1999): 934 inhabitants.
It distilles spirits from grain , flavoured with berries of the juniper tree, " the Genièvre (juniper) of Houlle ".
This is drunk with the local speciality (potjevleesch) and is used to refine Maroilles cheese.
" the Houlle " is also the name of a small river close to the village, tributary of the Aa, included in SAGE of Audomarois.