Other transcription(s)
 • Jawiرياو
 • Chinese廖内
Istana Kerajaan Siak (1).jpg
Jembatan Tengku Agung Sultanah Latifah.jpg
An-Nur panorama.jpg
Tesso Nilo 2009.jpg
Sejahtera Sakti Selatpanjang.jpg
Riau Main Stadium.JPG
Muara Takus temple.jpg
From top, left to right: Siak Palace, Tengku Agung Sultanah Latifah bridge, An-Nur Mosque, Tesso Nilo National Park, Hoo Ann Kiong Temple in Selatpanjang, Riau Main Stadium a largest stadium in Riau and Muara Takus Temple
Flag of Riau
Official seal of Riau
Bumi Bertuah Negeri Beradat (Malay)
(Ground of Fortunes, Land of Customs)
Location of Riau in Indonesia
Location of Riau in Indonesia
Coordinates: 0°32′N 101°27′E / 0°32′N 101°27′E / 0.533; 101.450

Riau (Jawi: رياو‬), is a province of Indonesia. It is located in the central eastern coast of Sumatra along the Strait of Malacca. Until 2004 the province included the offshore Riau Islands, a large group of small islands (of which the principal islands are Batam and Bintan) located east of Sumatra Island and south of Singapore, before these islands were split off as Riau Islands Province in July 2004. The provincial capital of Riau Province and its largest city is Pekanbaru. The province shares land borders with North Sumatra to the northwest, West Sumatra to the west, and Jambi to the south.

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 petroleum, natural gas, rubber, palm oil and fibre plantations. Extensive logging and plantation development in has led to a massive decline in forest cover Riau, and associated fires have contributed to haze across the larger region.

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;[4] however, this rate slowed significantly during the subsequent decade. The provincial population was 5,538,367 at the 2010 census,[5] 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.[6][7] 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.[8]

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.

Other Languages
Acèh: Riau
العربية: رياو
تۆرکجه: ریائو
Bân-lâm-gú: Riau
беларуская: Рыау (правінцыя)
български: Риау
català: Riau
Cebuano: Provinsi Riau
čeština: Riau
dansk: Riau
Deutsch: Riau
Esperanto: Riaŭo
estremeñu: Riau
euskara: Riau
فارسی: ریائو
français: Riau
客家語/Hak-kâ-ngî: Riau
한국어: 리아우 주
हिन्दी: रियाउ
Bahasa Hulontalo: Riau
Ilokano: Riau
Bahasa Indonesia: Riau
italiano: Riau
Basa Jawa: Riau
Kapampangan: Riau
ქართული: რიაუ
لۊری شومالی: ریائو
lietuvių: Riau
മലയാളം: റിയാവു
मराठी: रियाउ
Bahasa Melayu: Riau
Baso Minangkabau: Riau
Mìng-dĕ̤ng-ngṳ̄: Riau
монгол: Риау
Nederlands: Riau
日本語: リアウ州
norsk: Riau
پنجابی: صوبہ ریاؤ
polski: Riau
português: Riau (província)
русский: Риау
Simple English: Riau
српски / srpski: Ријау
srpskohrvatski / српскохрватски: Riau
Basa Sunda: Riau
suomi: Riau
svenska: Riau
Tagalog: Riau
தமிழ்: ரியாவு
Türkçe: Riau
українська: Ріау (провінція)
اردو: ریاو
Tiếng Việt: Riau
Winaray: Riau
粵語: 廖內
中文: 廖內省