Couvin (French pronunciation: [kuvɛ̃] ⓘ; Walloon: Couvén) is a city and municipality of Wallonia located in the province of Namur, Belgium.

Couvin is the second largest municipality of Belgium by surface area, after Tournai.

The municipality consists of the following districts: Aublain, Boussu-en-Fagne, Brûly, Brûly-de-Pesche, Couvin, Cul-des-Sarts, Dailly, Frasnes-lez-Couvin, Gonrieux, Mariembourg, Pesche, Petigny, Petite-Chapelle, and Presgaux.

Couvin railway station provides the town with a rail link direct to Charleroi.

One end of the Chemin de Fer à vapeur des Trois Vallées heritage railway is at Mariembourg.