| Bras de Bronne | |
| Pushpin Map: | France#France Hauts-de-France |
| Mouth Location: | Canche |
| Mouth Coordinates: | 50.4525°N 1.8206°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | France |
| Length: | 11km (07miles) |
The Bras de Bronne (sometimes spelled Bras de Brosne) is a small river in northern France whose 10.8km (06.7miles) course crosses the departement of the Pas-de-Calais.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.
There's an ancient watermill at Sempy.