Péruwelz (French: [pe.ʁ(y)we] ⓘ or [pɛʁ.we]; Picard: Piérwé [pi.eˈʀwe]; Walloon: Perwé-e-Hinnot) is a city and municipality of Wallonia located in the province of Hainaut, Belgium.

This municipality is more specifically situated in Western Hainaut, also called Picardy Wallonia.

Péruwelz is also near France, near the cities of "Condé-sur-l'Escaut", "Vieux Condé", "Hergnies", and is near the forest of Bon-Secours, the location of the castle of (l')Hermitage.

Louis Constant Wairy, chief valet of Napoleon Bonaparte.

Published elaborate Memoirs, relating his experiences at the French Imperial Court.