These are the Billboard magazine R&B singles chart number one hits of 1998
| † | Indicates best-charting R&B single of 1998[1] |
| Issue Date | Song | Artist |
|---|---|---|
| January 3 | "A Song for Mama" | Boyz II Men |
| January 10 | "My Body" | LSG |
| January 17 | ||
| January 24 | "Nice and Slow" | Usher |
| January 31 | ||
| February 7 | ||
| February 14 | ||
| February 21 | ||
| February 28 | ||
| March 7 | ||
| March 14 | ||
| March 21 | "No, No, No" | Destiny's Child |
| March 28 | "Let's Ride" | Montell Jordan featuring Master P and Silkk the Shocker |
| April 4 | "All My Life" | K-Ci & JoJo |
| April 11 | ||
| April 18 | "Let's Ride" | Montell Jordan featuring Master P and Silkk the Shocker |
| April 25 | ||
| May 2 | "Too Close" † | Next |
| May 9 | ||
| May 16 | ||
| May 23 | "I Get Lonely" | Janet and Blackstreet |
| May 30 | ||
| June 6 | "The Boy Is Mine" | Brandy and Monica |
| June 13 | ||
| June 20 | ||
| June 27 | ||
| July 4 | ||
| July 11 | ||
| July 18 | ||
| July 25 | ||
| August 1 | "Friend of Mine" | Kelly Price |
| August 8 | ||
| August 15 | ||
| August 22 | ||
| August 29 | ||
| September 5 | "The First Night" | Monica |
| September 12 | ||
| September 19 | ||
| September 26 | ||
| October 3 | ||
| October 10 | ||
| October 17 | "How Deep Is Your Love" | Dru Hill featuring Redman |
| October 24 | ||
| October 31 | ||
| November 7 | "Nobody's Supposed to Be Here" | Deborah Cox |
| November 14 | ||
| November 21 | ||
| November 28 | ||
| December 5 | ||
| December 12 | ||
| December 19 | ||
| December 26 |
