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.

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.

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.

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.