This is a list of the number-one hits of 2005 on FIMI's Italian Singles and Albums Charts.
| Issue date | Song | Artist | Album | Artist |
|---|---|---|---|---|
| 7 January | " Do They Know It's Christmas?" | Band Aid 20 | Best of Blue | Blue |
| 14 January | "Cleptomania" | Sugarfree | Greatest Hits | Robbie Williams |
| 21 January | Bula Bula | Mina | ||
| 28 January | Crescendo e cercando | Claudio Baglioni | ||
| 4 February | It's Time | Michael Bublé | ||
| 11 February | " Get Right" | Jennifer Lopez | Convivendo parte 2 | Biagio Antonacci |
| 18 February | ||||
| 25 February | "Cleptomania" | Sugarfree | ||
| 4 March | " Angelo" | Francesco Renga | It's Time | Michael Bublé |
| 11 March | "I bambini fanno "ooh..."" | Povia | ||
| 18 March | ||||
| 25 March | ||||
| 1 April | ||||
| 8 April | ||||
| 15 April | ||||
| 22 April | Devils & Dust | Bruce Springsteen | ||
| 29 April | Terrestre | Subsonica | ||
| 6 May | 4Ever Blue | Blue | ||
| 13 May | Buon Sangue | Jovanotti | ||
| 20 May | ||||
| 27 May | Don't Believe the Truth | Oasis | ||
| 3 June | X&Y | Coldplay | ||
| 10 June | ||||
| 17 June | ||||
| 24 June | TuttoMax | Max Pezzali and 883 | ||
| 1 July | ||||
| 8 July | ||||
| 15 July | ||||
| 22 July | " Army of Lovers" | Lee Ryan | ||
| 29 July | ||||
| 5 August | ||||
| 12 August | ||||
| 19 August | "I bambini fanno "ooh..."" | Povia | ||
| 26 August | " The Importance of Being Idle" | Oasis | ||
| 2 September | " La Camisa Negra" | Juanes | A Bigger Bang | The Rolling Stones |
| 9 September | ||||
| 16 September | "La nostra vita" | Eros Ramazzotti | Nome e cognome | Ligabue |
| 23 September | ||||
| 30 September | " Precious" | Depeche Mode | ||
| 7 October | "La nostra vita" | Eros Ramazzotti | Iguana cafè | Pino Daniele |
| 14 October | " Tripping" | Robbie Williams | Playing the Angel | Depeche Mode |
| 21 October | " Big City Life" | Mattafix | Intensive Care | Robbie Williams |
| 28 October | Calma apparente | Eros Ramazzotti | ||
| 4 November | " Hung Up" | Madonna | ||
| 11 November | Confessions on a Dance Floor | Madonna | ||
| 18 November | Il dono | Renato Zero | ||
| 25 November | ||||
| 2 December | ||||
| 9 December | ||||
| 16 December | In direzione ostinata e contraria | Fabrizio De André | ||
| 23 December | Il dono | Renato Zero | ||
| 30 December | Buoni o cattivi live Anthology 04.05 | Vasco Rossi |