Hot 100 number-one hits of 2004 (USA)

The Billboard Hot 100 is a chart that ranks the best-performing singles of the United States. Published by Billboard magazine, the data are compiled by Nielsen SoundScan based collectively on each single's weekly physical sales and airplay. In 2004, there were 11 singles that topped the chart. Although there were 12 singles that claimed the top spot in the 52 issues of the chart, hip hop duo Outkast's "Hey Ya!" began its peak position in 2003, and is thus excluded.

In 2004, 13 acts achieved their first U.S. number-one single, either as a lead artist or featured guest, including Fantasia Barrino, Ciara, Jamie Foxx, Lil Jon, Petey Pablo, Pharrell, Twista and Kanye West. Barrino and Ciara were the only acts to have earned a number-one debut single this year. R&B singer Usher had four number-one singles that appeared in the 2004 issues, and Outkast had two. During the year, seven collaboration singles reached the number-one position, tying the record set in 2003.

Usher's "Yeah!" is the longest-running number-one single of 2004, remaining in that position for 12 straight weeks. It is followed by his other single "Burn", whose streak on the top spot reached eight non-consecutive weeks. Other singles with extended chart runs include Ciara's "Goodies", which features Petey Pablo, and Usher's "My Boo", a duet with Alicia Keys, each topping the chart for seven and six weeks, respectively.

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