The best selling album in 2004 in United States was CONFESSIONS by USHER which sold 7,978,594 copies.
| Rank | Artist | Album | Sales | Released |
| 1 | USHER | CONFESSIONS | 7,978,594 | 2004 |
| 2 | NORAH JONES | FEELS LIKE HOME | 3,842,920 | 2004 |
| 3 | EMINEM | ENCORE | 3,517,097 | 2004 |
| 4 | KENNY CHESNEY | WHEN THE SUN GOES DOWN | 3,072,224 | 2004 |
| 5 | GRETCHEN WILSON | HERE FOR THE PARTY | 2,931,097 | 2004 |
| 6 | TIM MCGRAW | LIVE LIKE YOU WERE DYING | 2,786,840 | 2004 |
| 7 | MAROON 5 | SONGS ABOUT JANE | 2,708,415 | 2002 |
| 8 | EVANESCENCE | FALLEN | 2,614,226 | 2003 |
| 9 | ASHLEE SIMPSON | AUTOBIOGRAPHY | 2,576,945 | 2004 |
| 10 | NOW SERIES (US) | NOW THAT'S WHAT I CALL MUSIC! VOL. 16 | 2,560,316 | 2004 |
Source: Nielsen SoundScan