Jemeppe-sur-Sambre is a municipality in Wallonia, located in the province of Namur, Belgium. It comprises several districts, including Balâtre, Ham-sur-Sambre, Jemeppe-sur-Sambre, Mornimont, Moustier-sur-Sambre, Onoz, Saint-Martin, and Spy. The municipality is notable for the Spy Cave, one of Europe's significant Paleolithic sites, and historical landmarks like Balâtre Castle and Mielmont Castle.