# List of Billboard Digital Song Sales number ones of 2021

The Billboard Digital Song Sales chart is a chart that ranks the most downloaded songs in the United States. Its data is compiled by Nielsen SoundScan based on each song's weekly digital sales, which combines sales of different versions of a song by an act for a summarized figure.
In 2021, 28 acts reached number one (including features) with 22 songs. Fifteen artists achieved their first number-one digital song: Tom MacDonald, Gabby Barrett, Masked Wolf, Dua Lipa, DaBaby, Bryson Gray, Tyson James, Chandler Crump, Jack Harlow, State of Mine, Drew Jacobs, John Rich, Mike Rowe, Juice Wrld and Suga. The year was dominated by South Korean boy band BTS: they are the only act to have multiple number-one songs (5), one of only two acts to top the chart for multiple weeks, holding the top 10 digital song sales weeks of the year, and topping the chart for a total of 30 weeks. The band's "Dynamite" opened the year atop the chart, spending eight non-consecutive weeks in the lead (following its ten chart-topping weeks in 2020), making it the longest running number-one song in the chart's history, before being replaced by their own "Film Out". "Butter" later topped the chart for 18 non-consecutive weeks, tying the band's own "Dynamite", and accumulating at least 1,699,900 digital downloads.
Justin Bieber's "Anyone" became his 13th number-one song, breaking his tie with Drake for the most number-one songs by a male artist. It was replaced by singer-songwriter Olivia Rodrigo's debut single "Drivers License" which spent three weeks atop the chart, the only song not by BTS to top the chart for multiple weeks. Taylor Swift's "All Too Well (Taylor's Version)", a re-recorded version of her 2012 single "All Too Well", debuted atop the chart, extending her record as the artist with the most number-one songs on the chart, with 23. Following the release of a remix of The Weeknd's "Save Your Tears" with Ariana Grande, the song jumped to the number-one spot, becoming their sixth and eighth number-ones on the chart respectively.

## Chart history

Key :
| † | Indicates best-performing song of 2021 |
| Issue date | Song | Artist(s) | Weekly sales |
| January 2 | "Dynamite" | BTS | 16,000 |
| January 9 | "Dynamite" | BTS | 45,000 |
| January 16 | "Anyone" | Justin Bieber | 22,000 |
| January 23 | "Drivers License" | Olivia Rodrigo | 38,000 |
| January 30 | "Drivers License" | Olivia Rodrigo | 27,000 |
| February 6 | "Drivers License" | Olivia Rodrigo | 17,000 |
| February 13 | "Fake Woke" | Tom MacDonald | 14,000 |
| February 20 | "Up" | Cardi B | 34,000 |
| February 27 | "Love Story (Taylor's Version)" | Taylor Swift | 25,000 |
| March 6 | "Dynamite" | BTS | 14,500 |
| March 13 | "Dynamite" | BTS | 24,000 |
| March 20 | "Dynamite" | BTS | 27,900 |
| March 27 | "Dynamite" | BTS | 26,700 |
| April 3 | "Dynamite" | BTS | 43,000 |
| April 10 | "Dynamite" | BTS | 37,700 |
| April 17 | "Film Out" | BTS | 19,000 |
| April 24 | "Montero (Call Me by Your Name)" | Lil Nas X | 19,500 |
| May 1 | "The Good Ones" | Gabby Barrett | |
| May 8 | "Save Your Tears" | The Weeknd and Ariana Grande | 18,000 |
| May 15 | "Astronaut in the Ocean" | Masked Wolf | 12,500 |
| May 22 | "Levitating" | Dua Lipa featuring DaBaby | 19,900 |
| May 29 | "Seeing Green" | Nicki Minaj featuring Drake and Lil Wayne | 33,000 |
| June 5 | "Butter" † | BTS | 242,800 |
| June 12 | "Butter" † | BTS | 140,200 |
| June 19 | "Butter" † | BTS | 138,400 |
| June 26 | "Butter" † | BTS | 111,400 |
| July 3 | "Butter" † | BTS | 128,400 |
| July 10 | "Butter" † | BTS | |
| July 17 | "Butter" † | BTS | 108,800 |
| July 24 | "Permission to Dance" | BTS | 140,100 |
| July 31 | "Butter" † | BTS | 115,600 |
| August 7 | "Butter" † | BTS | 112,900 |
| August 14 | "Butter" † | BTS | 79,200 |
| August 21 | "Butter" † | BTS | 62,900 |
| August 28 | "Butter" † | BTS | 55,000 |
| September 4 | "Butter" † | BTS | 68,800 |
| September 11 | "Butter" † | BTS | 143,000 |
| September 18 | "Butter" † | BTS | 84,500 |
| September 25 | "Butter" † | BTS | 48,000 |
| October 2 | "Butter" † | BTS | 33,500 |
| October 9 | "My Universe" | Coldplay and BTS | 127,000 |
| October 16 | "My Universe" | Coldplay and BTS | 42,600 |
| October 23 | "Industry Baby" | Lil Nas X featuring Jack Harlow | 34,300 |
| October 30 | "Easy on Me" | Adele | 74,000 |
| November 6 | "Let's Go Brandon" | Bryson Gray featuring Tyson James and Chandler Crump | 48,000 |
| November 13 | "Let's Go Brandon" | Bryson Gray featuring Tyson James and Chandler Crump | |
| November 20 | "Easy on Me" | Adele | 14,600 |
| November 27 | "All Too Well (Taylor's Version)" | Taylor Swift | 57,800 |
| December 4 | "God's Country" | State Of Mine and Drew Jacobs | |
| December 11 | "Santa's Gotta Dirty Job" | John Rich and Mike Rowe | 13,000 |
| December 18 | "Butter" † | BTS | 26,500 |
| December 25 | "Girl of My Dreams" | Juice Wrld and Suga | 40,000 |