This is a list of the Austrian Singles Chart number-one hits of 1999.[1]
| Issue date | Song | Artist |
|---|---|---|
| 3 January | "Big Big World" | Emilia |
| 10 January | ||
| 17 January | ||
| 24 January | ||
| 31 January | "Narcotic" | Liquido |
| 7 February | ||
| 14 February | ||
| 21 February | ||
| 28 February | "A klana Indiana" | A klana Indiana |
| 7 March | ||
| 14 March | ||
| 21 March | "...Baby One More Time" | Britney Spears |
| 28 March | ||
| 4 April | ||
| 11 April | ||
| 18 April | ||
| 25 April | ||
| 2 May | ||
| 9 May | ||
| 16 May | "I Want It That Way" | Backstreet Boys |
| 23 May | ||
| 30 May | ||
| 6 June | "Uiii, is des bled!" | A klana Indiana |
| 13 June | ||
| 20 June | "Mambo No. 5" | Lou Bega |
| 27 June | ||
| 4 July | ||
| 11 July | ||
| 18 July | ||
| 25 July | ||
| 1 August | ||
| 8 August | ||
| 15 August | ||
| 22 August | ||
| 29 August | "Blue (Da Ba Dee)" | Eiffel 65 |
| 5 September | ||
| 12 September | ||
| 19 September | ||
| 26 September | ||
| 3 October | ||
| 10 October | "Genie in a Bottle" | Christina Aguilera |
| 17 October | ||
| 24 October | ||
| 31 October | ||
| 7 November | "Vater unser" | E Nomine |
| 14 November | ||
| 21 November | ||
| 28 November | "So bist du (und wenn Du gehst...)" | Oli.P |
| 5 December | ||
| 12 December | ||
| 19 December | "Maschen-Draht-Zaun" | Stefan Raab |
| 26 December |
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List of number-one singles & albums of the Ö3 Austria Top 40
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