This lists songs that hit number one on the charts in the US during 1998. If a song spent nonconsecutive weeks at number one, the number of weeks for each occurrence at the top is shown in parenthesis.
| Date | Artist - Title | Weeks at #1 |
| October 5 1997 – January 10 1998 | Elton John - Candle in the Wind 1997/Something About the Way You Look Tonight | 14 |
| January 11 – 24 1998 | Savage Garden - Truly Madly Deeply | 2 |
| January 25 – February 7 1998 | Janet Jackson - Together Again | 2 |
| February 8 – 21 1998 | Usher - Nice And Slow | 2 |
| February 22 – March 7 1998 | Celine Dion - My Heart Will Go On (Love Theme From 'Titanic') | 2 |
| March 8 – 28 1998 | Will Smith - Gettin' Jiggy Wit It | 3 |
| March 29 – April 18 1998 | K-Ci and JoJo - All My Life | 3 |
| April 19 – May 16 1998 | Next - Too Close | 5 (4) |
| May 17 – 23 1998 | Mariah Carey - My All | 1 |
| May 24 – 30 1998 | Next - Too Close | 5 (1) |
| May 31 – August 29 1998 | Brandy and Monica - The Boy Is Mine | 13 |
| August 30 – September 26 1998 | Aerosmith - I Don't Want To Miss A Thing | 4 |
| September 27 – October 10 1998 | Monica - The First Night | 5 (2) |
| October 11 – 17 1998 | Barenaked Ladies - One Week | 1 |
| October 18 – November 7 1998 | Monica - The First Night | 5 (3) |
| November 8 – 21 1998 | Lauryn Hill - Doo Wop (That Thing) | 2 |
| November 22 – 28 1998 | Divine - Lately | 1 |
| November 29 1998 – January 9 1999 | R. Kelly and Celine Dion - I'm Your Angel | 6 |
16 different songs hit number one in the US during 1998.
Top 5 Songs of 1998
1: Next - Too Close
2: Brandy and Monica - The Boy Is Mine
3: Shania Twain - You're Still The One
4: Savage Garden - Truly Madly Deeply
5: LeAnn Rimes - How Do I Live
2: Brandy and Monica - The Boy Is Mine
3: Shania Twain - You're Still The One
4: Savage Garden - Truly Madly Deeply
5: LeAnn Rimes - How Do I Live