Hastière is a municipality of Wallonia located in the province of Namur, Belgium.
On 1 January 2006 the municipality had 5,230 inhabitants. The total area is 56.46 square kilometres, giving a population density of 93 inhabitants per square kilometre.
The municipality consists of the following districts: Agimont, Blaimont, Hastière-Lavaux, Hastière-par-delà, Heer, Hermeton-sur-Meuse, and Waulsort.
Hastière's attractions along the Meuse River include the Romanesque church of a former Benedictine Monastery, the Renaissance Castle of Freÿr surrounded by 18th-century classical gardens and facing the rocks of Freÿr, and the 17th-century buildings of another former Benedictine monastery.