The Bras de Bronne (French pronunciation: [bʁa də bʁɔn]; sometimes spelled Bras de Brosne) is a small river in northern France whose 10.8 km (6.7 mi) course crosses the departement of the Pas-de-Calais.

[1] Its source is at the hamlet of Etreuille, near the village of Saint-Michel-sous-Bois.

It flows through the communes of Humbert, Sempy, Aix-en-Issart, Marant, Marenla and joins the river Canche at Marles-sur-Canche.

In winter, it is fed by an even smaller river at the commune of Quilen.

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