EC secretary-general Puchong Nutrawong said that of the over two million registered voters, 40,000 have chosen to vote in the provincial areas, while the rest will vote outside the provincial areas.
There are altogether 153 central polling stations outside the provinces.
He said the much watchful area is in Bangkapi area in Bangkok where more than 80,000 voters have registered for advance polls. Other areas which will be closely watched are Bang Khunthien, and where industrial estates are housed such as Ayutthaya, Chonburi and Samut Prakarn.
He said more than 100,000 voters in these areas have registered for advance polls.
The EC secretary-general also said that of the 77 provinces where elections are to be held on January 26, election offices in 20 provinces have been encircled and shut down by protesters.
The advance polls on January 26 will be a test if the February 2 general election can be held or not, he said.
He predicted encirclement of election offices by protesters on Sunday which may disrupt polling by voters, but said election officials have been advised how to cope with such situation.
Earlier the People’s Democratic Reform Committee vowed to shut down all election offices to disrupt the advance polls.