"Indonesia's 13,000 islands stretch 3200 miles west to east!" Click on a region to learn more about it! Indonesia Facts Population: 213,000,000 (4th largest) Capital: Jakarta Religion: 85% Muslim, 10% Christian, 5% other. Official Language: Indonesian Islands: 13,667 Total Languages: 850 NTM Tribal Works: 16 NTM established churches: 59+ Click here to learn more about Indonesia!