The best selling album in 1991 in United States was ROPIN' THE WIND by GARTH BROOKS which sold 4,000,000 copies.
| Rank | Artist | Album | Sales | Released |
| 1 | GARTH BROOKS | ROPIN' THE WIND | 4,000,000 | 1991 |
| 2 | MARIAH CAREY | MARIAH CAREY | 3,380,000 | 1990 |
| 3 | GARTH BROOKS | NO FENCES | 3,370,000 | 1990 |
| 4 | NATALIE COLE | UNFORGETTABLE WITH LOVE | 3,260,000 | 1991 |
| 5 | METALLICA | METALLICA | 3,200,000 | 1991 |
| 6 | MICHAEL BOLTON | TIME, LOVE & TENDERNESS | 3,170,000 | 1991 |
| 7 | C&C MUSIC FACTORY | GONNA MAKE YOU SWEAT | 3,150,000 | 1990 |
| 8 | GUNS N' ROSES | USE YOUR ILLUSION II | 2,810,000 | 1991 |
| 9 | R.E.M. | OUT OF TIME | 2,780,000 | 1991 |
| 10 | VANILLA ICE | TO THE EXTREME | 2,450,000 | 1990 |
Source: Nielsen SoundScan