Dumai, is a coastal city in Riau Province on the island of Sumatra, Indonesia. The city has an area of 2,066.72 km² and had 331,832 inh…Dumai, is a coastal city in Riau Province on the island of Sumatra, Indonesia. The city has an area of 2,066.72 km² and had 331,832 inhabitants at mid 2022 official estimate. Dumai has a domestic airport, Pinang Kampai Airport. Dumai is an important transport and trade centre, both regionally and internationally, especially to Malaysia. Dumai is rich in oil.
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