Dumai, is a coastal city in Riau Province on the island of Sumatra, Indonesia, about 188 km from Pekanbaru, the provincial capital. The city has an area of 2,065.59 km2 and had 338,064 inhabitants at the mid 2023 official estimate. Dumai has a domestic airport, Pinang Kampai Airport. The city is an important transport and trade centre, both regionally and internationally, especially for traffic to and from Malaysia. The region is rich in oil.