Fontaine-l'Évêque (; ) is a city and municipality of Wallonia located in the province of Hainaut, Belgium.
On January 1, 2006, Fontaine-l'Évêque had a total population of 16,687. The total area is 28.41 km<sup>2</sup> which gives a population density of 587 inhabitants per km<sup>2</sup>.
The municipality consists of the following districts: Fontaine-l'Évêque, Forchies-la-Marche, and Leernes.
thumb|250px|none|[[Fontaine-l'Évêque Castle, once the castle of the de Fontaines]]