HELLIN (anciently Ilunum), a royal town of Spain, in the province of Murcia, and capital of a cognominal department in the bishopric of Cartagena. It lies on the slope of the Sierra de Segura. The parish church is very elegant, the masonry and marble pavement at the entrance being worthy of special notice. Near Hellin are the mineral baths of Azaraque; and the celebrated sulphur mines, at a distance of twelve miles, are under its jurisdiction. Hellin was sacked by the French under Monbrun; and was the point where Joseph and Soult united with Suchet after Marmon's rout at Salamanca. The industry of Hellin is chiefly confined to the manufacture of earthenware, linens, cloths, hats, flour, oil, and chocolate. Pop. 8818.