List of number-one hits of 2005 (Austria)
# List of number-one hits of 2005 (Austria)

This is a list of the Austrian Singles Chart number-one hits of 2005.

| Issue date | Song | Artist |
| - | - | - |
| 2 January | "Sweetest Poison" | Nu Pagadi |
| 9 January | "Sweetest Poison" | Nu Pagadi |
| 16 January | "Sweetest Poison" | Nu Pagadi |
| 23 January | "Schnappi, das kleine Krokodil" | Schnappi |
| 30 January | "Schnappi, das kleine Krokodil" | Schnappi |
| 6 February | "Schnappi, das kleine Krokodil" | Schnappi |
| 13 February | "Schnappi, das kleine Krokodil" | Schnappi |
| 20 February | "Schnappi, das kleine Krokodil" | Schnappi |
| 27 February | "Schnappi, das kleine Krokodil" | Schnappi |
| 6 March | "Schnappi, das kleine Krokodil" | Schnappi |
| 13 March | "Schnappi, das kleine Krokodil" | Schnappi |
| 20 March | "Schnappi, das kleine Krokodil" | Schnappi |
| 27 March | "Schnappi, das kleine Krokodil" | Schnappi |
| 3 April | "Schnappi, das kleine Krokodil" | Schnappi |
| 10 April | "Emanuela" | Fettes Brot |
| 17 April | "Emanuela" | Fettes Brot |
| 24 April | "Emanuela" | Fettes Brot |
| 1 May | "Emanuela" | Fettes Brot |
| 8 May | "Candy Shop" | 50 Cent featuring Olivia |
| 15 May | "Cowboy" | Ch!pz |
| 22 May | "Cowboy" | Ch!pz |
| 29 May | "Cowboy" | Ch!pz |
| 5 June | "Lonely" | Akon |
| 12 June | "Lonely" | Akon |
| 19 June | "Lonely" | Akon |
| 26 June | "Lonely" | Akon |
| 3 July | "Lonely" | Akon |
| 10 July | "Lonely" | Akon |
| 17 July | "Lonely" | Akon |
| 24 July | "Lonely" | Akon |
| 31 July | "Lonely" | Akon |
| 7 August | "Rising Girl" | Rising Girl |
| 14 August | "Rising Girl" | Rising Girl |
| 21 August | "Rising Girl" | Rising Girl |
| 28 August | "La Camisa Negra" | Juanes |
| 4 September | "Durch den Monsun" | Tokio Hotel |
| 11 September | "Durch den Monsun" | Tokio Hotel |
| 18 September | "Durch den Monsun" | Tokio Hotel |
| 25 September | "Durch den Monsun" | Tokio Hotel |
| 2 October | "Durch den Monsun" | Tokio Hotel |
| 9 October | "Durch den Monsun" | Tokio Hotel |
| 16 October | "Push the Button" | Sugababes |
| 23 October | "Push the Button" | Sugababes |
| 30 October | "Push the Button" | Sugababes |
| 6 November | "Push the Button" | Sugababes |
| 13 November | "Push the Button" | Sugababes |
| 20 November | "Hung Up" | Madonna |
| 27 November | "Hung Up" | Madonna |
| 4 December | "Hung Up" | Madonna |
| 11 December | "Hung Up" | Madonna |
| 18 December | "Hung Up" | Madonna |
| 25 December | "Hung Up" | Madonna |
