List of best-selling singles in South Korea

This is a list of best-selling singles in South Korea since the Korea Music Content Industry Association (KMCA) began tracking sales figures for digital downloads in 2010. All singles listed here have sold at least three million copies.

Indie pop band Busker Busker's 2012 single "Cherry Blossom Ending" is the best-selling song in South Korea since 2010, with eight million copies sold as of 2021. Pop soloist IU has six songs on the list, the most of any artist.

Background
In 2010, the Korea Music Content Industry Association (KMCA) established the Gaon Chart, a weekly record chart that tabulates both physical and digital music sales. Gaon first published digital download figures for songs in February 2011, when it released a list of the best-selling songs of 2010. On March 11, 2011, Gaon began publishing the weekly Gaon Download Chart, which included sales figures for songs. Gaon stopped releasing weekly sales figures for songs in 2018 and introduced a certification system that recognizes songs that reach at least 2.5 million downloads. The chart (renamed the Circle Chart in 2022 ) also periodically reports sales figures for songs released before the introduction of the certification system.

Best-selling singles by year
Below is a list of the best-selling singles by year, since 2010, based on the Circle Download Chart. As of 2018, the chart does not publish yearly sales figures, but it continues to rank songs based on downloads.