Vielsalm is a municipality of Wallonia located in the province of Luxembourg, Belgium. The town is part of the Arrondissement of Bas…Vielsalm is a municipality of Wallonia located in the province of Luxembourg, Belgium. The town is part of the Arrondissement of Bastogne. It is the place of origin of the House of Salm. On 1 January 2018 the municipality had 7,821 inhabitants. The total area is 139.76 km², giving a population density of 56 inhabitants per km².