It is part of the Métropole Européenne de Lille. Erquinghem is one of a series of villages on the river Lys established by the Viking Rikiwulf in 880 AD at the time of the invasion led by Godfrid, Duke of Frisia: Racquinghem, Reclinghem, Rekkem and Rijkegem (the latter two now in West Flanders - Belgium).