These are the Canadian number-one albums of 1991.[1] The chart was compiled and published by RPM every Saturday.
| Issue date | Album | Artist |
|---|---|---|
| January 12 | To the Extreme | Vanilla Ice |
| January 19 | The Immaculate Collection | Madonna |
| January 26 | ||
| February 2 | ||
| February 9 | ||
| February 16 | ||
| February 23 | ||
| March 2 | The Soul Cages | Sting |
| March 9 | ||
| March 16 | ||
| March 23 | ||
| March 30 | ||
| April 6 | Road Apples | The Tragically Hip |
| April 13 | ||
| April 20 | Mariah Carey | Mariah Carey |
| April 27 | ||
| May 4 | Road Apples | The Tragically Hip |
| May 11 | Out of Time | R.E.M. |
| May 18 | ||
| May 25 | ||
| June 1 | ||
| June 8 | ||
| June 15 | ||
| June 22 | ||
| June 29 | ||
| July 6 | Pornograffitti | Extreme |
| July 13 | ||
| July 20 | ||
| July 27 | ||
| August 3 | ||
| August 10 | ||
| August 17 | Unforgettable... with Love | Natalie Cole |
| August 24 | ||
| August 31 | ||
| September 7 | ||
| September 14 | Pornograffitti | Extreme |
| September 21 | ||
| September 28 | Metallica | Metallica |
| October 5 | Use Your Illusion I and II | Guns N' Roses |
| October 12 | ||
| October 19 | Use Your Illusion II | |
| October 26 | ||
| November 2 | Waking Up the Neighbours | Bryan Adams |
| November 9 | ||
| November 16 | ||
| November 23 | ||
| November 30 | ||
| December 7 | Mad Mad World | Tom Cochrane |
| December 14 | Achtung Baby | U2 |
| December 21 |