Rival political parties are trying to figure out where they stand in key, swing regions.
Although the media is forbidden from releasing opinion polls six days before elections, internal polls within the parties are allowed, and they suggest a number of tight races.
The last official poll numbers from last week showed the ruling Saenuri Party had the upper hand in six regions, and the main opposition New Politics Alliance for Democracy in five.
But the ruling party now says it is only certain of victory in four regions, and the main opposition party believes it has a high chance in winning in just three regions.
Both parties are referring to their traditional strongholds.
As there are less than two days of campaigning left, political analysts believe the two parties are merely trying to boost support and encourage voter turnout by suggesting they are facing unfavorable odds.
This was also seen in their reactions to the early voting turnout on Sunday.
The ruling Saenuri Party expressed concerns about the high voter turnout among young people, while the main opposition New Politics Alliance for Democracy said the number wasn't actually that high considering that the majority of the country's 35-thousand soldiers are part of the 16 percent of young people who voted in advance.
Experts say voters in their forties to early fifties will hold the key to the local elections this year.
Kwon Soa, Arirang News.