Lessines is a city and municipality of Wallonia located in the province of Hainaut, Belgium. As of the 2014 census, The municipality's total population was 18,637. The total area is 72.29 km2 which gives a population density of 247 inhabitants per km2. The municipality consists of the following districts: Bois-de-Lessines, Deux-Acren, Ghoy, Lessines, Ogy, Ollignies, Papignies, and Wannebecq. Lessines is a municipality of Picardy Wallonia.