Racquinghem (French pronunciation: [ʁakɛ̃ɡɛm]; West Flemish: Rakingem) is a commune in the Pas-de-Calais department in the Hauts-de-France region of France about 6 miles (9 km) southeast of Saint-Omer, on the banks of the Noeufossé canal, the border between the department of Nord and the Pas de Calais.

The commune is close to the eastern boundary of the Helfaut plateau, site of the Helfaut Nature Reserve. Its flora comprises both dry and wet heathland and some protected fauna, mostly amphibians.^{[citation needed]}