Briastre () is a commune in the Nord department in northern France.
In Briastre is a chemistry-factory. In the near of Briastre are agriculture farms.
The Lamour Watermill, Briastre <small>(French: Le Moulin Lamour)</small> is a museum and art center located in the commune. The water-powered mill and its edifices were built in 1800. Preponderantly operating the mechanical processes of milling (grinding), rolling, or hammering up until the 1930s, the watermill was converted into a museum by the Bellevals in the late 1990s.