Somme-Leuze is a municipality of Wallonia located in the province of Namur, Belgium. On 1 January 2006 the municipality had 4,656 inhabitants. The total area is 95.09 km2, giving a population density of 49 inhabitants per km2. The municipality consists of the following districts: Baillonville, Bonsin, Heure-en-Famenne, Hogne, Nettinne, Noiseux, Sinsin, Somme-Leuze, and Waillet.