Alcanar is a Spanish municipality of the Catalan comarca of Montsià, in the Tarragona province. It is a coastal town on the Mediterranean Sea. The Serra del Montsià range and its foothills rise above the town and its surroundings. According to data from 2006 its population is 9,620 inhabitants, although this increased the next year, to 9,969. It is the southernmost town in Catalonia, located just north of the border with the municipality of Vinaròs which is in the province of Castellón and part of the region of Valencia.