List of Billboard Hot 100 number ones of 1998

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.

During the year, 10 acts had achieved a first U.S. number-one single, namely: Savage Garden, Usher, Will Smith, Next, Brandy, Monica, Aerosmith, Barenaked Ladies, Lauryn Hill, and Divine.

Brandy and Monica's "The Boy Is Mine" is the longest-running single of the year, staying at number one for thirteen consecutive weeks.

Other singles that had a multiple chart run includes Monica's "The First Night" with five weeks atop and Next's "Too Close", Aerosmith's "I Don't Want to Miss a Thing" and R. Kelly's "I'm Your Angel" (featuring Céline Dion) with four weeks (the latter spending two additional weeks at number one in 1999).