Tellin (French pronunciation: [tɛlɛ̃]; Walloon: Telin) is a municipality of Wallonia located in the province of Luxembourg, Belgium, in the Ardennes. On 1 January 2007 the municipality, which covers 56.64 km², had 2,386 inhabitants, giving a population density of 42.1 inhabitants per km². The municipality consists of the following districts: , , , and Tellin.