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%).
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