Écaussinnes (French pronunciation: ​[ekosin]; Picard: Les Scassenes; Walloon: Les Scåssenes) is a municipality of Wallonia located in the province of Hainaut, Belgium. On 1 January 2018 Écaussinnes had a total population of 11,135. The total area is 34.77 km2 which gives a population density of 320 inhabitants per km2. The municipality consists of the following districts: Écaussinnes-d'Enghien, , and . The city hosts the "Oberbayern" Festival each year in August, and hosted the Spring Blues Festival from 1988 to 2013.