These are the Australian number-one albums of 2003, per the ARIA Charts.
| Issue Date | Album | Artist | Weeks at number one (total) |
| 6 January | Let Go | Avril Lavigne | 7 weeks |
| 13 January | Let Go | Avril Lavigne | 7 weeks |
| 20 January | Let Go | Avril Lavigne | 7 weeks |
| 27 January | 8 Mile | Soundtrack | 2 weeks |
| 3 February | 8 Mile | Soundtrack | 2 weeks |
| 10 February | Come Away with Me | Norah Jones | 9 weeks |
| 17 February | Come Away with Me | Norah Jones | 9 weeks |
| 24 February | Come Away with Me | Norah Jones | 9 weeks |
| 3 March | Come Away with Me | Norah Jones | 9 weeks |
| 10 March | Come Away with Me | Norah Jones | 9 weeks |
| 17 March | Come Away with Me | Norah Jones | 9 weeks |
| 24 March | Come Away with Me | Norah Jones | 9 weeks |
| 31 March | Innocent Eyes | Delta Goodrem | 29 weeks |
| 7 April | Innocent Eyes | Delta Goodrem | 29 weeks |
| 14 April | Innocent Eyes | Delta Goodrem | 29 weeks |
| 21 April | Innocent Eyes | Delta Goodrem | 29 weeks |
| 28 April | Innocent Eyes | Delta Goodrem | 29 weeks |
| 5 May | Innocent Eyes | Delta Goodrem | 29 weeks |
| 12 May | Come Away with Me | Norah Jones | 9 weeks |
| 19 May | Come Away with Me | Norah Jones | 9 weeks |
| 26 May | Innocent Eyes | Delta Goodrem | 29 weeks |
| 2 June | Innocent Eyes | Delta Goodrem | 29 weeks |
| 9 June | Innocent Eyes | Delta Goodrem | 29 weeks |
| 16 June | St. Anger | Metallica | 2 weeks |
| 23 June | St. Anger | Metallica | 2 weeks |
| 30 June | Innocent Eyes | Delta Goodrem | 29 weeks |
| 7 July | Innocent Eyes | Delta Goodrem | 29 weeks |
| 14 July | Vulture Street | Powderfinger | 3 weeks |
| 21 July | Vulture Street | Powderfinger | 3 weeks |
| 28 July | Vulture Street | Powderfinger | 3 weeks |
| 4 August | Innocent Eyes | Delta Goodrem | 29 weeks |
| 11 August | Innocent Eyes | Delta Goodrem | 29 weeks |
| 18 August | Innocent Eyes | Delta Goodrem | 29 weeks |
| 25 August | The Official Fiction | Something for Kate | 1 week |
| 1 September | Innocent Eyes | Delta Goodrem | 29 weeks |
| 8 September | Innocent Eyes | Delta Goodrem | 29 weeks |
| 15 September | Innocent Eyes | Delta Goodrem | 29 weeks |
| 22 September | Innocent Eyes | Delta Goodrem | 29 weeks |
| 29 September | Innocent Eyes | Delta Goodrem | 29 weeks |
| 6 October | Life for Rent | Dido | 2 weeks |
| 13 October | Life for Rent | Dido | 2 weeks |
| 20 October | Innocent Eyes | Delta Goodrem | 29 weeks |
| 27 October | Innocent Eyes | Delta Goodrem | 29 weeks |
| 3 November | Innocent Eyes | Delta Goodrem | 29 weeks |
| 10 November | Innocent Eyes | Delta Goodrem | 29 weeks |
| 17 November | Innocent Eyes | Delta Goodrem | 29 weeks |
| 24 November | Innocent Eyes | Delta Goodrem | 29 weeks |
| 1 December | Innocent Eyes | Delta Goodrem | 29 weeks |
| 8 December | Innocent Eyes | Delta Goodrem | 29 weeks |
| 15 December | Just As I Am | Guy Sebastian | 4 weeks |
| 22 December | Just As I Am | Guy Sebastian | 4 weeks |
| 29 December | Just As I Am | Guy Sebastian | 4 weeks |
Famous quotes containing the words list, number-one:
“The advice of their elders to young men is very apt to be as unreal as a list of the hundred best books.”
—Oliver Wendell Holmes, Jr. (1841–1935)
“I’m your number-one fan.”
—William Goldman (b. 1931)