Dumai (Jawi: دوماي‎, Chinese: 杜迈), is a coastal city in Riau Province on the island of Sumatra, Indonesia, about 188 km from Pekanbaru, the provincial capital.

At its inception, the city only consisted of three districts, containing 13 urban villages and 9 rural villages, with a population of just 15,699 people and a density of 83.85/km2.The city is now divided into seven districts (kecamatan), tabulated below with their areas and their populations at the 2010 census[5] and the 2020 census,[6] together with the official estimates as at mid 2023.

To support the increase in GDP that heavy economic development point of Dumai is to maintain the dominance of construction on industrial sectors, trade, transport and buildings in addition to paying attention to the agricultural sector as a producer of industrial raw materials.

Rapid economic growth rate has also provided job opportunities for people, so that the social welfare in Dumai increases.

[citation needed] Four districts in Dumai (Sungai Sembilan, Medang Kampai, lime and West Damai) is an area that has the potential of land resources for the development of agribusiness and agro-industries with appropriate technology engineering byocyclo such as rice farming, crops, vegetables, bananas, pineapples, durian, mango, rambutan, palm, cattle (cows, goats, ducks and chickens) as well as the cultivation of farmed freshwater fish (catfish, carp, carp and ornamental fish).

Bus services operate to Duri, Padang, Medan, Jambi, Pekanbaru and other cities and regions in Riau Province and Sumatra (Terminal AKAP).

There are some interesting sights on the way to Dumai, such as the Sakai tribe, tropical forests along the River, and water colour is unique as the color of tea.