La Roche-en-Ardenne is a Walloon municipality of Belgium located in the province of Luxembourg and the arrondissement of Marche-en-Famenne. Lying beside a bend in the River Ourthe, the small town of La Roche-en-Ardenne is one of the most popular tourist destinations in the Ardennes.
On 1 January 2007 the municipality, which covers 147.52 km2, had 4,348 inhabitants, giving a population density of 29.5 inhabitants per km2
