Ethnic groups in Indonesia Ethnic groups in Indonesia There are over 300 ethnic groups in Indonesia including Javanese, Sundanese, and Batak. Based on ethnic group, the largest ethnic group in Indonesia is the Javanese who make up about 40% of the total population. The Javanese are concentrated on the island of Java but millions have migrated to other islands throughout the archipelago because of the transmigration program. The Sundanese, Malay, and Madurese are the next largest groups in the country. Many ethnic groups, particularly in Kalimantan and Papua, have only hundreds of members. Most of the local languages belong to Austronesian language family, although
Indonesia Indonesia Indonesia ( , ; Indonesian: ), officially the Republic of Indonesia ( ), is a country in Southeast Asia, between the Indian and Pacific oceans. It is the world's largest island country, with more than seventeen thousand islands, and at , the 14th largest by land area and the 7th largest in combined sea and land area. With over floor(/1e6) million people, it is the world's 4th most populous country as well as the most populous Muslim-majority country. Java, the world's most populous island, contains more than half of the country's population. The sovereign state is a presidential, constitutional