Theux is a Walloon municipality of Belgium in Province of Liège. On 1 January 2006 the municipality had 11,571 inhabitants. The total area is 83.36 km², giving a population density of 139 inhabitants per km².
The municipality consists of the following sub-municipalities: Theux proper, La Reid, and Polleur.
In World War II, the 75th Division of the U.S. Army, 575th Signal Co., maintained its command post in the town from January 10-12, 1945, as it counterattacked against the German army in the Battle of the Bulge.
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