| • ||رياو|
| • ||廖内|
|Motto(s): Bumi Bertuah Negeri Beradat (|
(Ground of Fortunes, Land of Customs)
Location of Riau in Indonesia
|Established||August 10, 1957|
|• Body||Riau Regional Government|
|• Governor||Arsyadjuliandi Rachman (|
|• Total||87,023.66 km2 (33,600.02 sq mi)|
|Elevation||10 m (30 ft)|
|Highest elevation||1,091 m (3,579 ft)|
|Lowest elevation||0 m (0 ft)|
|• Density||73/km2 (190/sq mi)|
|• Density rank||24th|
Warga Riau (
Kaum Riau (
|• Ethnic groups|
|GRP per capita||US$ 9,252.17|
|Largest city by area|
|Largest city by population|
|Largest regency by area|
|Largest regency by population|
|Website||Government official site|
The total area for Riau province is 87,023.66 km², which stretches from the slopes of the Bukit Barisan to the Strait of Malacca. Riau has a wet tropical climate with average rainfall ranging between 2000-3000 millimeters per year, and the average rainfall per year is about 160 days.
Riau is currently one of the richest provinces in Indonesia and is rich in natural resources, particularly
Since the 1970s, much of Indonesia has experienced a decline in population growth rates. Riau has been a significant exception, with increasing rates every decade since 1970 to a 4.35 percent annual rise for the 1990s; however, this rate slowed significantly during the subsequent decade. The provincial population was 5,538,367 at the 2010 census,  and according to the estimate for January 2014 this had risen to 6,358,636.
There are three possible origins of the word riau which became the name of this province. First, from the Portuguese word, "rio" which means river. In 1514, there was a Portuguese military expedition that traced the Siak River, in order to find the location of a kingdom they believed existed in the area, and at the same time to pursue followers of Sultan Mahmud Shah who fled after the fall of the Malacca Sultanate.
The second version mentions that riau comes from the word riahi which means sea water. The word is allegedly derived from the figure of Sinbad al-Bahar in the book of the Thousand and One Nights, and the third version mentions that this word comes from the local people's speech, lifted from the word rioh or boisterous, which means crowded, frenzied working people. Perhaps this name is derived from the naming of local people, the Malays who live in the Bintan area, which is now located in the Riau Islands. The name is likely to have become famous since Raja Kecil moved the Malay kingdom center from Johor to Ulu Riau in 1719.