Dumai (Jawi:, ), is a city in Riau province on the island of Sumatra, Indonesia. The city has an area of 2,039.35 km² and has 253,803 inhabitants at the 2010 Census and 285,448 at the 2015 Census; the latest official estimate (as at 1 July 2019) is 302,623. Dumai has a domestic airport, which is Pinang Kampai Airport. Dumai is an important transport and trade centre, both regionally and internationally, especially to Malaysia. Dumai is rich in oil (petroleum and palm oil).