These are the Irish Recorded Music Association's number one albums of 2008, per the Top 100 Individual Artist Albums chart.
| Issue Date | Album | Artist |
|---|---|---|
| 3 January | In Rainbows | Radiohead |
| 10 January | Call Me Irresponsible | Michael Bublé |
| 17 January | Back to Black | Amy Winehouse |
| 25 January | Good Girl Gone Bad | Rihanna |
| 31 January | Skybound | Tom Baxter |
| 7 February | Sleep Through the Static | Jack Johnson |
| 14 February | ||
| 21 February | Back to Black | Amy Winehouse |
| 28 February | Once (Soundtrack) | Soundtrack |
| 6 March | Rockferry | Duffy |
| 13 March | ||
| 20 March | 25 Years - 25 Songs | Mary Black |
| 27 March | ||
| 3 April | Accelerate | R.E.M. |
| 10 April | 25 Years - 25 Songs | Mary Black |
| 17 April | ||
| 1 May | Hard Candy | Madonna |
| 8 May | The Two of Us | Christie Hennessy |
| 15 May | ||
| 22 May | The Galway Girl - The Best Of | Sharon Shannon |
| 29 May | ||
| 5 June | Radiohead: The Best Of | Radiohead |
| 12 June | ||
| 19 June | Viva la Vida or Death and All His Friends | Coldplay |
| 26 June | ||
| 3 July | ||
| 10 July | ||
| 17 July | ||
| 24 July | ||
| 31 July | ||
| 7 August | ABBA Gold: Greatest Hits | ABBA |
| 14 August | The Script | The Script |
| 21 August | ||
| 28 August | ||
| 4 September | ||
| 11 September | ||
| 18 September | Death Magnetic | Metallica |
| 25 September | Only by the Night | Kings of Leon |
| 2 October | ||
| 9 October | ||
| 16 October | ||
| 23 October | Black Ice | AC/DC |
| 31 October | A Hundred Million Suns | Snow Patrol |
| 7 November | ||
| 14 November | My Love: Essential Collection | Celine Dion |
| 21 November | The Priests | The Priests |
| 28 November | Day & Age | The Killers |
| 5 December | The Priests | The Priests |
| 12 December | The Circus | Take That |
| 19 December | ||
| 26 December |