Ronchin (French pronunciation: [ʁɔ̃ʃɛ̃]) is a commune in the Nord department, Hauts-de-France, France.

It is part of the European Metropolis of Lille.

[3] Or, on an escarbuncle sable a ruby gules.

(Abscon, Beuvry-la-Forêt, Erre, Fenain, Marchiennes, Ronchin, Tilloy-lez-Marchiennes and Wandignies-Hamage use the same arms.)

This Nord geographical article is a stub.