List of Billboard Hot 100 number ones of 2021

The Billboard Hot 100 is a chart that ranks the best-performing songs in the United States.

Twenty-four acts reached number one in 2021, nine of whom earned their first number-one single: Olivia Rodrigo, Daniel Caesar, Giveon, Silk Sonic, Anderson .Paak, Polo G, The Kid Laroi, Future, and Jack Harlow.

Their single "Butter" is the longest running number-one song of 2021, spending ten weeks atop the chart.

Rodrigo's "Drivers License" was 2021's longest running number-one single by a female artist, with eight consecutive weeks atop.

Taylor Swift scored her career's eighth number-one song this year with "All Too Well (Taylor's Version)", which broke the 49-year-old Hot 100 record of Don McLean's "American Pie" (1972) to become the longest song of all time to top the chart, clocking at 10 minutes and 13 seconds.

South Korean boy band BTS topped the Hot 100 for 12 non-consecutive weeks, aided by three number-one debuts: " Butter ", " Permission to Dance " and the Coldplay collaboration " My Universe ".
American singer Olivia Rodrigo reigned atop the chart for nine weeks, with two singles that debuted at number-one, " Drivers License " and " Good 4 U ", both from her debut studio album, Sour .
Canadian singer Justin Bieber topped the chart for eight weeks, aided by " Peaches " and the Kid Laroi collaboration " Stay ".
" Easy on Me " by English singer Adele , her first single in nearly six years, topped the chart for ten weeks total, seven of them in 2021.
American rapper Lil Nas X scored two number-one singles with " Montero (Call Me by Your Name) " and " Industry Baby "; both from his debut album, Montero .
" What's Next " and " Way 2 Sexy " by Canadian rapper Drake charted atop the Hot 100 for one week each.