Aubin-Saint-Vaast is a commune in the Pas-de-Calais department in northern France .
Aubin-Saint-Vaast is a commune . It is found in the region Nord-Pas-de-Calais in the Pas-de-Calais department in the north of France .
Aubin-Saint-Vaast is a city. It is found in the region Sud-Pas-de-Calais in the Pas-de-Calais department in the south of France.