Chimay is a Walloon municipality located in the Belgian province of Hainaut. On January 1, 2006, Chimay had a total population of 9,774. The total area is 197.10 km² which gives a population density of 50 inhabitants per km². The source of the Oise River is located in the municipality.
Situated in the administrative district of Thuin, the municipality was created with a merger of 14 old communes on January 1, 1977. The Trappist monastery of Scourmont Abbey is located in the town and is famous for the Chimay Brewery.