Norcia, traditionally known in English by its Latin name of Nursia, is a town and commune in the province of Perugia (Italy) in southeastern Umbria. Unlike many ancient towns, it is located in a wide plain abutting the Monti Sibillini, a subrange of the Apennines with some of its highest peaks, near the Sordo River, a small stream that eventually flows into the Nera. The town is popularly associated with the Valnerina (the valley of that river).

The area is known for its air and scenery, and is a base for mountaineering and hiking. It is also widely known for hunting, especially of the wild boar, and for sausages and ham made from wild boar and pork. Such products have been named after Norcia; in Italian, they are called norcineria.