Fretin (French pronunciation: [fʁətɛ̃]) is a commune in the Nord department in northern France.

[3] It is in the south of the Métropole Européenne de Lille.

It contains the Fretin triangle, a high speed flying junction joining the HSL 1 railway line from Brussels to the LGV Nord from Paris to the Channel Tunnel.

(Fretin, Saultain and Wannehain use the same arms.)

This Nord geographical article is a stub.