These are the Australian number-one albums of 2004, per the ARIA Charts.
| Issue Date | Album | Artist | Weeks at number one (total) |
| 5 January | Just As I Am | Guy Sebastian | 4 weeks |
| 12 January | Innocent Eyes | Delta Goodrem | 29 weeks |
| 19 January | Innocent Eyes | Delta Goodrem | 29 weeks |
| 26 January | Fallen | Evanescence | 3 weeks |
| 2 February | Fallen | Evanescence | 3 weeks |
| 9 February | Fallen | Evanescence | 3 weeks |
| 16 February | That's What I'm Talking About | Shannon Noll | 4 weeks |
| 23 February | That's What I'm Talking About | Shannon Noll | 4 weeks |
| 1 March | That's What I'm Talking About | Shannon Noll | 4 weeks |
| 8 March | That's What I'm Talking About | Shannon Noll | 4 weeks |
| 15 March | Sunrise Over Sea | The John Butler Trio | 3 weeks |
| 22 March | Sunrise Over Sea | The John Butler Trio | 3 weeks |
| 29 March | Feeler | Pete Murray | 5 weeks |
| 5 April | Feeler | Pete Murray | 5 weeks |
| 12 April | Feeler | Pete Murray | 5 weeks |
| 19 April | Feeler | Pete Murray | 5 weeks |
| 19 April | Feeler | Pete Murray | 5 weeks |
| 26 April | Anastacia | Anastacia | 2 weeks |
| 3 May | Anastacia (album) | Anastacia | 1 week |
| 10 May | Michael Bublé | Michael Bublé | 2 weeks |
| 17 May | Get Born | Jet | 2 weeks |
| 24 May | Get Born | Jet | 2 weeks |
| 31 May | Under My Skin | Avril Lavigne | 1 week |
| 7 June | Wayward Angel | Kasey Chambers | 5 weeks |
| 14 June | Wayward Angel | Kasey Chambers | 5 weeks |
| 21 June | Wayward Angel | Kasey Chambers | 5 weeks |
| 28 June | Wayward Angel | Kasey Chambers | 5 weeks |
| 5 July | Wayward Angel | Kasey Chambers | 5 weeks |
| 12 July | For All You've Done | Hillsong Church | 1 week |
| 19 July | Sunrise Over Sea | The John Butler Trio | 3 weeks |
| 26 July | Shrek 2 | Soundtrack | 1 week |
| 2 August | One Determined Heart | Paulini | 2 weeks |
| 9 August | One Determined Heart | Paulini | 2 weeks |
| 16 August | Anastacia | Anastacia | 2 weeks |
| 23 August | Elephunk | The Black Eyed Peas | 1 week |
| 30 August | Classified | bond | 1 week |
| 6 September | Michael Bublé | Michael Bublé | 2 weeks |
| 13 September | The Sound of White | Missy Higgins | 7 weeks |
| 20 September | The Sound of White | Missy Higgins | 7 weeks |
| 27 September | American Idiot | Green Day | 2 weeks |
| 4 October | American Idiot | Green Day | 2 weeks |
| 11 October | The Chronicles of Life and Death | Good Charlotte | 1 week |
| 18 October | Songs About Jane | Maroon 5 | 1 week |
| 25 October | Greatest Hits | Robbie Williams | 9 weeks |
| 1 November | Greatest Hits | Robbie Williams | 9 weeks |
| 8 November | Greatest Hits | Robbie Williams | 9 weeks |
| 15 November | Mistaken Identity | Delta Goodrem | 1 week |
| 22 November | Encore | Eminem | 1 week |
| 29 November | How to Dismantle an Atomic Bomb | U2 | 1 week |
| 6 December | Greatest Hits | Robbie Williams | 9 weeks |
| 13 December | Greatest Hits | Robbie Williams | 9 weeks |
| 20 December | Greatest Hits | Robbie Williams | 9 weeks |
| 27 December | Greatest Hits | Robbie Williams | 9 weeks |
Famous quotes containing the words list, number-one:
“Religious literature has eminent examples, and if we run over our private list of poets, critics, philanthropists and philosophers, we shall find them infected with this dropsy and elephantiasis, which we ought to have tapped.”
—Ralph Waldo Emerson (1803–1882)
“I’m your number-one fan.”
—William Goldman (b. 1931)