The Democratic Party (DP) candidate led the poll with 48.5%, down 1.7 percentage points from last week, according to a survey conducted by Realmeter of 1,505 adults aged over 18.
Lee's support has dipped slightly, falling below the 50% mark due to uncertainty over the outcome of an election law violation case, but he remains the clear front-runner among all candidates, according to the pollster.
Former Labor Minister Kim Moon-soo of the ruling People Power Party (PPP) trailed Lee with 13.4%.
Former Daegu Mayor Hong Joon-pyo and ex-PPP leader Han Dong-hoon garnered 10.2%, and 9.7% respectively.
By party, the DP received 46.8% support, while the PPP secured 34.6%.
South Korea is set to hold a presidential election on June 3 after former President Yoon Suk Yeol was removed from office over his botched martial law bid.
AzVision.az
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