Pekanbaru (Jawi: ڤكنبارو) is the capital of Riau, on the island of Sumatra . It has an area of 632.26 km² with a population of 950,571, making it Sumatra's fourth largest municipality, after Medan, Palembang, and Batam, and the 9th-largest city in Indonesia after Greater Jakarta, Surabaya, Bandung, Medan, Semarang, Makassar, Palembang, and Batam.