List of Inkigayo Chart winners (2020)

The Inkigayo Chart is a music program record chart on Seoul Broadcasting System (SBS) that gives an award to the best-performing single of the week in South Korea. The chart measures digital performance in domestic online music services (5,500 points), social media via YouTube views (3,000 points), album sales (1,000 points), network on-air time (1,000 points), and advanced viewer votes (500 points) in its ranking methodology. A methodology used since February 3, 2019. Songs that spend three weeks at number one are awarded a Triple Crown and are removed from the chart and ineligible to win again. In 2020, the show was hosted by Monsta X member Lee Min-hyuk, NCT member Jaehyun and April member Lee Na-eun. They had been hosting the show together since October 20, 2019.

In 2020, 26 singles ranked number one on the chart and 21 music acts received an award trophy for this feat. Eleven songs have collected trophies for three weeks and earned a Triple Crown: Red Velvet's "Psycho", Zico's "Any Song", BTS's "On", "Dynamite", and "Life Goes On", Itzy's "Wannabe", IU's "Eight", Blackpink's "How You Like That", "Ice Cream" and "Lovesick Girls", and Hwasa's "María". Three groups achieved their first number one on the chart in 2020. Girl group (G)I-dle achieved their first ever number one on the chart on the April 19 episode with their single "Oh My God". They went on to achieve another number one with "Dumdi Dumdi" in August. Iz*One, formed through the third season of Produce 101, gained their first number one Inkigayo with "Secret Story of the Swan" in June. Their single "Panorama" also ranked number one on the December 20 broadcast. On the February 23 broadcast "Late Night" by Noel helped the boy band achieve their first number one on the chart.

Five soloist won their first Inkigayo award in 2020. Suho of Exo and Taemin of Shinee had their first number one on the chart with their singles "Let's Love" and "Idea", respectively. Mamamoo member Hwasa won her first ever Inkigayo award with her single "María". The single went on to rank number one for three consecutive weeks and achieved a triple crown. BTS ranked three singles at number one on the chart in 2020 achieved with "On", "Dynamite" and "Life Goes On". All three singles ranked number one for three weeks and achieved triple crowns. The former single accumulated 10,627 points on the March 8 broadcast making it the single with the highest points of the year. Member Suga ranked number one on the chart with "Eight" as a featured artist. The single also achieved a triple crown. In addition to BTS, girl group Blackpink also had three number one singles in 2020; "How You Like That", "Ice Cream" and "Lovesick Girls". The latter two singles helped the group rank number one for six weeks in a row - a first time record on the chart. Twice had two number one singles in 2020 achieved with "More & More" and "I Can't Stop Me". The latter went on to achieve a triple crown the following year.