Étalle is a municipality of Wallonia located in the province of Luxembourg, Belgium. On 1 January 2007 the municipality, which covers 78.1 km²â€¦Étalle is a municipality of Wallonia located in the province of Luxembourg, Belgium. On 1 January 2007 the municipality, which covers 78.1 km², had 5,389 inhabitants, giving a population density of 69 inhabitants/km².