Voters in the eastern province of Papua lined up to cast their ballots at 7 a.m., which is two hours ahead of Jakarta, Xinhua news agency reported.
President Widodo picks Muslim cleric Ma'aruf Amin as running mate, while rival former general Prabowo Subianto pairs with former businessman and deputy governor of Jakarta, Sandiaga Salahuddin Uno, according to the general election commission.
Widodo emphasises the importance of more economic stability and business friendly environment, while Probowo is apt to approach more protectionism to champion people's prosperity.
Meanwhile, over 245,000 candidates supported by 16 national political parties and four local parties are vying for more than 20,000 seats in the parliamentary elections during the the world's biggest single-day poll.
--IANS pgh/