Andenne is a city and municipality of Wallonia located in the province of Namur, Belgium.
On January 1, 2006, Andenne had a total population of 25,240. The total area is 86.17 km² which gives a population density of 292 inhabitants per km². The municipality, and the central city, extend on both sides of the river Meuse.
The municipality consists of the following districts: Andenne, Bonneville, Coutisse, Landenne, Maizeret, Namêche, Sclayn, Seilles, Thon-Samson, and Vezin.