January 1991
- Born Jan 5–11Justify My Love · Madonna
- Born Jan 12–18Justify My Love · Madonna
- Born Jan 19–25Love Will Never Do (Without You) · Janet Jackson
- Born Jan 26 – Feb 1The First Time · Surface
February 1991
- Born Feb 2–8The First Time · Surface
- Born Feb 9–15Gonna Make You Sweat (Everybody Dance Now) · C+C Music Factory featuring Freedom Williams
- Born Feb 16–22Gonna Make You Sweat (Everybody Dance Now) · C+C Music Factory featuring Freedom Williams
- Born Feb 23 – Mar 1All the Man That I Need · Whitney Houston
March 1991
- Born Mar 2–8All the Man That I Need · Whitney Houston
- Born Mar 9–15Someday · Mariah Carey
- Born Mar 16–22Someday · Mariah Carey
- Born Mar 23–29One More Try · Timmy T
- Born Mar 30 – Apr 5Coming Out of the Dark · Gloria Estefan
April 1991
- Born Apr 6–12Coming Out of the Dark · Gloria Estefan
- Born Apr 13–19I've Been Thinking About You · Londonbeat
- Born Apr 20–26You're in Love · Wilson Phillips
- Born Apr 27 – May 3Baby Baby · Amy Grant
May 1991
- Born May 4–10Baby Baby · Amy Grant
- Born May 11–17Joyride · Roxette
- Born May 18–24I Like the Way (The Kissing Game) · Hi-Five
- Born May 25–31I Don't Wanna Cry · Mariah Carey
June 1991
- Born Jun 1–7I Don't Wanna Cry · Mariah Carey
- Born Jun 8–14More Than Words · Extreme
- Born Jun 15–21Rush Rush · Paula Abdul
- Born Jun 22–28Rush Rush · Paula Abdul
- Born Jun 29 – Jul 5Rush Rush · Paula Abdul
July 1991
- Born Jul 6–12Rush Rush · Paula Abdul
- Born Jul 13–19Rush Rush · Paula Abdul
- Born Jul 20–26Unbelievable · EMF
- Born Jul 27 – Aug 2(Everything I Do) I Do It for You · Bryan Adams
August 1991
- Born Aug 3–9(Everything I Do) I Do It for You · Bryan Adams
- Born Aug 10–16(Everything I Do) I Do It for You · Bryan Adams
- Born Aug 17–23(Everything I Do) I Do It for You · Bryan Adams
- Born Aug 24–30(Everything I Do) I Do It for You · Bryan Adams
- Born Aug 31 – Sep 6(Everything I Do) I Do It for You · Bryan Adams
September 1991
- Born Sep 7–13(Everything I Do) I Do It for You · Bryan Adams
- Born Sep 14–20The Promise of a New Day · Paula Abdul
- Born Sep 21–27I Adore Mi Amor · Color Me Badd
- Born Sep 28 – Oct 4I Adore Mi Amor · Color Me Badd
October 1991
- Born Oct 5–11Good Vibrations · Marky Mark and the Funky Bunch featuring Loleatta Holloway
- Born Oct 12–18Emotions · Mariah Carey
- Born Oct 19–25Emotions · Mariah Carey
- Born Oct 26 – Nov 1Emotions · Mariah Carey
November 1991
- Born Nov 2–8Romantic · Karyn White
- Born Nov 9–15Cream · Prince and the New Power Generation
- Born Nov 16–22Cream · Prince and the New Power Generation
- Born Nov 23–29When a Man Loves a Woman · Michael Bolton
- Born Nov 30 – Dec 6Set Adrift on Memory Bliss · P.M. Dawn