1,904,569 sq km (735,358 square miles).

269,544,949 (2019)

140.08 per sq km.

Jakarta

Republic.

Indonesia lies between the mainland of Southeast Asia and Australia in the Indian and Pacific oceans. It is the world's largest archipelago country. Indonesia is made up of five main islands - Sumatra, Java, Sulawesi, Kalimantan (part of the island of Borneo) and New Guinea - and 30 smaller archipelagos.

In total, the Indonesian archipelago consists of about 18,307 islands according to the National Institute of Aeronautics and Space; 6,000 of these are inhabited and stretch over 4,828km (3,000 miles), most lying in a volcanic belt with more than 400 volcanoes, the great majority of which are extinct. The landscape varies from island to island, ranging from high mountains and plateaux to coastal lowlands and alluvial belts.

The high incidence of volcanoes in Indonesia is due to its location along a stretch of the Pacific Ring of Fire. The collision of various tectonic plates means that around 90% of the world's earthquakes occur within this area, with Indonesia suffering from frequent earthquakes and volcano eruptions.

87% Muslim, 10% Christian, 1.7% Hindu, with the remaining practise Buddhism or other faiths.

Social courtesies are often fairly formal. Using a few words of the local language will be appreciated. When visiting private homes or religious buildings, take off your shoes. When drink or food is served, it should not be touched until the host invites the guest to do so. Never pass or accept anything with the left hand, as this is seen as unclean. Public displays of affection between men and women are frowned upon, and kissing in public will attract a great deal of unwanted attention.

Touching a stranger of the same sex while in conversation is very common. Smiling is a cultural tradition and Indonesians smile frequently, even in an uncomfortable or difficult situation. Visitors should avoid losing their temper as saving face is very important in Indonesian culture; tourists should avoid putting others in a situation where they may feel embarrassed or ashamed. Both men and women should take care to dress in an appropriate way for their surroundings. Before taking photographs of someone, ask for permission first.

230 volts AC, 50Hz but 127 volts is still used in some areas. Plugs used are European-style with two circular metal pins.

President Joko Widodo since 2014.

President Joko Widodo since 2014.

The discovery of the remains of 'Java Man' suggests that Indonesia was inhabited by early humans as early as 1.5 million years ago, but little evidence remains of early tribal civilisations. In the 7th century, Indonesia fell under the influence of the Srivijaya kingdom, bringing Hinduism and Buddhism to the islands for the first time.

Islam arrived in the 13th century, and Java and Sumatra became powerful sultanates, while other islands continued to follow Hindu, Buddhist and Animist traditions. The Portuguese were the first Europeans to settle in Indonesia in 1512, establishing trade posts for valuable spices such as nutmeg and cloves. Dutch and British traders followed in their footsteps.

A century later in 1602, the Dutch established the Dutch East India Company (VOC), took over major trade routes and eventually established colonial rule over the archipelago.

The start of the 20th century saw the beginnings of an Indonesian independence movement known as Sarekat Islam, which gained huge popularity, despite suppression from the Dutch colonial regime. The Japanese invasion in WWII lead to the withdrawal of the Dutch, but some four million Indonesians died as a result of the occupation.

The subsequent surrender of Japan at the end of the war lead the then-president Sukarno to pronounce Indonesia's independence on 17 August 1945, but democracy was quickly replaced by an increasingly authoritarian regime with power residing ultimately with the president and a series of appointed councils. To unify this disjointed collection of kingdoms and sultanates, the Sukarno regime launched a massive propaganda campaign based on concepts of national heroes and national identity.

In 1965, General Suharto seized control in a military coup and brutally suppressed opposition in a reign lasting until 1998. The independent islands of West Irian and East Timor were annexed, and farmers from Muslim majority islands were strategically settled on other islands.

Eventually, opposition to Suharto's rule reached a critical level during the East Asian Financial Crisis. Suharto was forced to step down in 1998 and was replaced by B. J. Habibie. The presidents that followed included Abdurrahman Wahid, Megawati Sukarnoputri, Susilo Bambang Yudhoyono and Joko Widodo.

Indonesia has faced a few major earthquakes in recent years and the country has managed to rebuild and continue to attract tourists to the archipelago.

Did you know?
• There are more than 150 volcanoes in Indonesia, and 127 of them are still active.
• Indonesia is the most populous Muslim nation in the world.
• The National Institute of Aeronautics and Space said Indonesia has 18,307 islands according to its survey, but other surveys show different figures, so no one really knows exactly how many islands they are in Indonesia.