The survey, conducted by Realmeter after the April 27 inter-Korea summit, showed 64.7 percent of respondents said they trust Pyongyang's willingness for denuclearization and commitment to lasting peace on the peninsula.
Those who don't trust the North accounted for 28.3 percent, while 7 percent said they were unsure. The survey was conducted on 500 people aged over 19, The Korea Times reported.
In the same survey, 52.1 percent, who distrusted North Korea's willingness for denuclearization and establishment of peace in the past, said they changed their minds to trust it while 12.6 percent said they trusted it in the past. South Koreans who didn't and still don't trust the North Korea's willingness are at 26.2 percent.
"The results are likely because South Koreans verified the authenticity in the messages in the summit where President Moon Jae-in and North Korean leader Kim Jong-un made a touching moment and discussed the denuclearization of the Korean Peninsula and policies to make peace," the pollster said.
Meanwhile, seven in 10 Koreans said they support the Moon Jae-in administration.
In another poll, 70 percent of 2,502 adults aged over 19 approved of the performance of the President's state affairs, up 2.2 percentage points from last week. It took four months for Moon Jae-in's government to post support rates over 70 percent.
"In most age, political and regional groups, the approval rate of Moon's administration increased thanks to the news of the inter-Korean summit, and efforts of denuclearization and peace in the country garnered attention," the pollster said.