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
Christianity in Indonesia Christianity in Indonesia Christianity is Indonesia's second-largest religion, after Islam. Indonesia also has the second-largest Christian population in Southeast Asia after the Philippines, the largest Protestant population in Southeast Asia, and the fourth-largest Christian in Asia after the Philippines, India and China. Indonesia's 24 million Christians constitute 10% of the country's population, with 7% Protestant (17 million) and 3% Catholic (7 million). Some provinces in Indonesia are majority Christian (Protestant or Catholic). Christianity, a minority religion in Indonesia, is not evenly spread throughout the archipelago. Indonesian provinces with a majority of the population self-identifying as Christian are Papua, West Papua,