South Korea in the Quackvision Song Contest 01

Background
Main Article: South Korea

South Korea was announced to be one of the countries that were confirmed to participate in the inaugural edition of the Quackvision Song Contest, with quaackeers as their head of delegation for the edition. As with all the other countries competing in this edition, it was their official debut in the contest.

Internal Selection
Jo Yuri was announced to be the representative for South Korea for the first edition of the Quackvision Song Contest, being the fifteenth song to be revealed for the contest. The song was revealed to be "GLASSY", a song sung in Korean and English.

Grand Final
Nearing the end of the Song Reveal period for the edition, the Quackvision Event 01 revealed the halves that the contestants would be performing in, with the final running order being revealed on 31 July 2021. For the show, South Korea was placed in the first half, performing seventh, following the entry from Norway and preceding the entry from San Marino. At the end of the show, South Korea placed tenth in the final, scoring 106 points: 59 from the televote (10th) and 47 from the juries (11th).