Merbes-le-Château (French pronunciation: [mɛʁb lə ʃɑto]; Walloon: Miebe) is a municipality of Wallonia located in the province of Hainaut, Belgium.

On January 1, 2006, Merbes-le-Château had a total population of 4,093.

The total area is 30.24 km2 which gives a population density of 135 inhabitants per km2.

The municipality consists of the following districts: Fontaine-Valmont, Labuissière, Merbes-le-Château, and Merbes-Sainte-Marie.

This Hainaut Province location article is a stub.