The best selling album in 2005 in United States was THE EMANCIPATION OF MIMI by MARIAH CAREY which sold 4,968,606 copies.
| Rank | Artist | Album | Sales | Released |
| 1 | MARIAH CAREY | THE EMANCIPATION OF MIMI | 4,968,606 | 2005 |
| 2 | 50 CENT | THE MASSACRE | 4,852,744 | 2005 |
| 3 | KELLY CLARKSON | BREAKAWAY | 3,496,192 | 2004 |
| 4 | GREEN DAY | AMERICAN IDIOT | 3,360,394 | 2004 |
| 5 | THE BLACK EYED PEAS | MONKEY BUSINESS | 3,037,251 | 2005 |
| 6 | COLDPLAY | X&Y | 2,615,280 | 2005 |
| 7 | RASCAL FLATTS | FEELS LIKE TODAY | 2,511,209 | 2004 |
| 8 | GWEN STEFANI | LOVE. ANGEL. MUSIC. BABY. | 2,505,390 | 2004 |
| 9 | KANYE WEST | LATE REGISTRATION | 2,413,580 | 2005 |
| 10 | THE GAME | THE DOCUMENTARY | 2,275,646 | 2005 |
Source: Nielsen SoundScan