Religion in Indonesia

About 87% of Indonesians are Muslim, which gives Indonesia more Muslims than any other country. Yet it isn't an Islamic state. The government recognizes six religions: Islam, Protestantism, Catholicism, Hinduism, Buddhism and Confucianism. Christians make up roughly 10% of the population, Hindus under 2% (most of them on Bali) and Buddhists under 1%, according to 2022 Ministry of Home Affairs data.

You'll notice religion in Indonesia within hours of landing. The call to prayer rolls across Javanese rooftops at dawn. On Bali, small offerings appear on doorsteps and shrines every day. And the calendar of fasts, feasts and processions decides when roads fill up and when an entire island goes quiet, which is worth knowing before you pick your dates.

Indonesia's religions at a glance

Shares: Ministry of Home Affairs, 2022, as reported by the US State Department.

Many Indonesians also honor ancestral spirits and local customs alongside their official faith, which is why Indonesian Islam, Hinduism and Christianity rarely look like their counterparts elsewhere.

Why Indonesia recognizes six religions: Pancasila

Indonesia's founding philosophy, Pancasila, explains why the state recognizes several religions instead of one. The name comes from Sanskrit: panca means five, sila means principles. Here they are:

1. Belief in the One and Only God
2. A just and civilized humanity
3. The unity of Indonesia
4. Democracy guided by consultation and representation
5. Social justice for all Indonesians

Pancasila sits in the constitution and runs through everyday political language, alongside the national motto Bhinneka Tunggal Ika, "Unity in Diversity". It's the frame that holds a Muslim-majority country together with Hindu Bali, the Christian east and Chinese-Indonesian Confucians.

The first principle has a practical side. Every adult has to list a religion on their national ID card, and "no religion" isn't an option, as the Pew Research Center notes. The constitution guarantees freedom of worship, though Pew also ranks Indonesia's government restrictions on religion as "very high". And Islamic law applies in one province only: Aceh, at the northern tip of Sumatra.

The main religions, one by one

Islam

Islam reached the archipelago along trade routes, carried mainly by Muslim traders from South Asia, and spread gradually from the coasts inland. By the 14th century it had become the dominant religion along the coasts of Java and Sumatra. People added Islam to what they already believed, which is why, as Britannica puts it, Islam is expressed differently in Indonesia than in the Middle East.

The vast majority of Indonesian Muslims are Sunni. How strictly people practice depends a lot on where you are: it's most conservative in Aceh, West Sumatra, West Java and south-eastern Kalimantan. On Java, locals distinguish the santri, who follow orthodox practice, from the abangan, whose Islam mixes with ancestral beliefs. Both groups keep the slametan, a communal meal held for protection and blessing at births, weddings, funerals and other milestones.

The biggest celebration is Idul Fitri, the end of Ramadan, marked across the country with family reunions and a lot of food.

Christianity

About 10% of Indonesians are Christian: 7.4% Protestant and 3.0% Catholic in 2022. Portuguese missionaries brought Catholicism in the 16th century, and the Dutch brought Protestantism in the 17th. Evangelical churches grew in the 1980s and 1990s, especially among Chinese-Indonesians.

Christians are spread unevenly. They form majorities in several eastern provinces, and Papua's six provinces hold just 2% of Indonesia's population but 15% of its Christians. Services often mix in local music, languages and traditions.

Hinduism

Before Islam, the archipelago was ruled by Hindu and Buddhist kingdoms, shaped by Indian traders and priests. Today Hindus are 1.7% of the population, concentrated on Bali, with many followers on neighboring Lombok too. Balinese Hinduism absorbed animist and Buddhist elements over the centuries, so it differs clearly from Hinduism as practiced in India. Island life runs on daily offerings, temple ceremonies and a busy festival calendar. It deserves its own page, and has one: our guide to religion in Bali.

The big one for visitors is Nyepi, the Balinese New Year and its Day of Silence (more on that below).

Buddhism

Buddhists are under 1% of Indonesians today (0.7% in 2022), mostly within the Chinese-Indonesian community, but its history here goes back much further. In the 9th century, Javanese courts practiced Hinduism and Buddhism side by side and saw Shiva and Buddha as two forms of the same spiritual being. Borobudur, the great Buddhist monument of that era, still draws pilgrims every year for Waisak, which marks the Buddha's birth, enlightenment and passing.

Confucianism

Confucianism is one of the six official religions, practiced mainly in the Chinese-Indonesian community. Many Chinese-Indonesians in the cities are Christian, while others follow Buddhism or Confucianism, sometimes mixed together. You'll see it most clearly at Imlek, Chinese New Year, when Confucian, Buddhist and local customs share the same street parties.

Indigenous beliefs and animism

Indigenous beliefs have no official status, but they shape a great many ceremonies. Indonesia's Ministry of Education estimates that about 12 million people blend traditional beliefs, known as aliran kepercayaan, into their religious practice, across roughly 187 communities. On Nias, on Sumba and among the Dayak of Borneo, ceremonies call on ancestral spirits and modern prayers in the same breath. Sacred mountains, ancestral sites and harvest rituals keep their place in weddings and funerals too. The best-known example is the Toraja funeral traditions of Sulawesi.

Where each faith dominates: a regional guide

Indonesia's religions mostly arrived by sea, settled on the coasts first and reached the interior slowly, and you can still see that pattern on a map.

• Java: Muslim majority, with the santri and abangan traditions side by side and the Kejawen mystic tradition still practiced. Java also holds the great monuments of its Hindu-Buddhist past, Borobudur and Prambanan, near Yogyakarta.
• Sumatra: largely Muslim, and the most conservative region of the country, especially Aceh (the only province under sharia) and West Sumatra.
• Bali and Lombok: Bali is the Hindu island, the one big exception in a Muslim-majority country. Hinduism also has many followers on Lombok next door.
• The eastern islands: Christian communities are strongest in Flores, Timor, northern Sulawesi, the Moluccas and Papua.
• Kalimantan and Sulawesi: Muslim along the coasts, with Christian and traditional communities further inland, from Dayak villages in Borneo to the Toraja highlands of South Sulawesi.

How faiths blend: Indonesia's syncretism

Ask an Indonesian about their religion and you'll get one answer, the one on their ID card. Watch how they practice it and you'll often see several traditions at once.

On Java, Kejawen fuses Islamic teaching with Javanese mysticism and ancestral customs. In Yogyakarta, the sultan's court still holds ceremonies that blend Islam, Hindu-Javanese cosmology and royal ritual; three times a year, the Garebeg procession heads to the Kraton, the sultan's palace, where the gunungan, a towering offering of food, is shared with the crowd. Balinese Hinduism holds onto animist and Buddhist layers. Among the Mandar of Sulawesi, Islamic prayers sit alongside the makkuliwa lopi ceremony, which celebrates both faith and the community's seafaring heritage.

This habit of layering a new faith onto older ones goes back to the Javanese kingdoms that honored Shiva and Buddha together, and it helps explain how so many religions share the same islands.

What Indonesia's religions mean for your trip

Festivals that change your plans

Religious dates move every year, and some of them reshape a trip:

• Nyepi (Bali): the Balinese New Year opens with parades of huge ogoh-ogoh demon effigies. On Nyepi itself the whole island goes silent, and visitors are expected to stay in their hotel and keep the noise down.
• Galungan and Kuningan (Bali): roads fill with penjor, tall decorated bamboo poles, while ancestral spirits are believed to visit. Kuningan, ten days later, marks their departure. The dates follow Bali's 210-day calendar.
• Waisak (Borobudur): pilgrims process with lanterns at dusk. Book accommodation early, and wear white or muted colors if you join the ceremony.
• Idul Fitri (nationwide): the end of Ramadan, with dates set by the lunar calendar.
• Garebeg (Yogyakarta): three processions a year to the Kraton, the sultan's palace.

Because dates shift, check our festivals in Indonesia guide before you book.

Temples, mosques and ceremonies: how to behave

Indonesians are used to visitors and generally very welcoming. These are the habits that matter most:

• Wear a sarong and sash in Balinese temples, and cover up in mosques and other Muslim places.
• Take your shoes off before entering temples and homes.
• Use your right hand to give, receive, eat and greet; the left is considered unclean.
• Ask before photographing people, especially at ceremonies.
• Never stand above a priest leading a ceremony.
• At a Toraja funeral, wear dark, covering clothes, and wait to be invited by the family or a local guide.

Our guide to cultural dos and don'ts in Indonesia covers the rest, from greetings to gestures.

Religious sites worth the detour

Borobudur, the great Buddhist monument, and Prambanan, its Hindu counterpart, are both UNESCO World Heritage Sites in Central Java, near Yogyakarta. Together they show, in stone, the Hindu-Buddhist chapter that came before Islam. Borobudur features on our From Java to Lombok trip.

Plan your trip around Indonesia's festivals

If you'd like to time a trip with Nyepi, Waisak or a Toraja ceremony, Arizta and our local team in Indonesia can help you get the dates right and plan the days around them. Start with our Indonesia trip ideas.