Reports say the vote is recording a high turnout, which suggest eagerness by voters to move on from the past corruption scandal.
The vote is also expected to end a months-long leadership vacuum.
You would recall that former president PARK GEUN-HYE was impeached in March on charges of bribery and abuse of power.
PARK became South Korea’s first democratically elected president to be thrown out of office and strait to jail on awaiting trial on charges that she deny.