Demographics of Indonesia local ethnic languages are the first language of most Indonesians and are still important. Indonesia demographic composition has a relatively young population. According to 2011 estimate, total median age of Indonesia is 28.2 years. Total Fertility Rate (TFR) (Wanted Fertility Rate) and Crude Birth Rate (CBR): Total fertility rate (TFR) and population over age 60 by region as of 2010: Source: "UN World Population Prospects" There are over 300 ethnic groups in Indonesia. 95% of those are of Native Indonesian ancestry. Javanese is the largest group with 100 million people (42%), followed by Sundanese who number nearly 40 million (15%).
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,