Colfontaine (French pronunciation: [kɔlfɔ̃tɛn] ⓘ; Walloon: Colfontinne; Picard: Colfontinne) is a municipality of Wallonia located in the province of Hainaut, Belgium.

On 1 January 2006, the municipality had 20,021 inhabitants.

The total area is 13.62 km2, giving a population density of 1,470 inhabitants per km2.

The municipality consists of the following districts: Pâturages, Warquignies, Wasmes (town centre; it includes the village of Petit Wasmes).

This Hainaut Province location article is a stub.