Tucapel is a town and commune in the Arauco Province, Bío Bío Region, Chile. It was once a region of Araucanía named for the Tucapel River. The name of the region derived from the rehue and aillarehue of the Moluche people of the area between the Lebu and the Lleulleu Rivers, who were famed for their long resistance to the Spanish in the Arauco War.