Biar is a town and municipality in the comarca of Alt Vinalopó, in the province of Alicante, Spain. It lies within the Valencia region, in the country's southeast.
The town sits at the foot of the Serra de Mariola, a mountain range that shapes the surrounding landscape. It is located about 39 kilometres from the city of Alicante.
Biar is one of the municipalities that make up the Alt Vinalopó comarca, an inland district of Alicante province.