Martelange is a municipality of Wallonia located in the province of Luxembourg, Belgium. On 1 January 2007 the municipality, which co…Martelange is a municipality of Wallonia located in the province of Luxembourg, Belgium. On 1 January 2007 the municipality, which covers 29.67 km², had 1,584 inhabitants, giving a population density of 53.4 inhabitants per km². Besides Martelange itself, the municipality includes the villages of Grumelange and Radelange.