These are the Official Charts Company's UK Indie Chart number-one albums of 2005.
| Issue date | Album | Artist(s) | Record label | Ref. |
|---|---|---|---|---|
| 2 January | Hot Fuss | The Killers | Lizard King | [1] |
| 9 January | [2] | |||
| 16 January | [3] | |||
| 23 January | [4] | |||
| 30 January | [5] | |||
| 6 February | [6] | |||
| 13 February | [7] | |||
| 20 February | Silent Alarm | Bloc Party | Wichita | [8] |
| 27 February | Hot Fuss | The Killers | Lizard King | [9] |
| 6 March | [10] | |||
| 13 March | Employment | Kaiser Chiefs | B-Unique | [11] |
| 20 March | Language. Sex. Violence. Other? | Stereophonics | V2 | [12] |
| 27 March | The Singles | Basement Jaxx | XL | [13] |
| 3 April | [14] | |||
| 10 April | [15] | |||
| 17 April | [16] | |||
| 24 April | [17] | |||
| 1 May | [18] | |||
| 8 May | Mighty ReArranger | Robert Plant & The Strange Sensation | Sanctuary | [19] |
| 15 May | The Singles | Basement Jaxx | XL | [20] |
| 22 May | A Certain Trigger | Maxïmo Park | Warp | [21] |
| 29 May | Employment | Kaiser Chiefs | B-Unique | [22] |
| 5 June | [23] | |||
| 12 June | Get Behind Me Satan | The White Stripes | XL | [24] |
| 19 June | [25] | |||
| 26 June | The Singles | Basement Jaxx | [26] | |
| 3 July | [27] | |||
| 10 July | The Understanding | Röyksopp | Wall of Sound | [28] |
| 17 July | Hot Fuss | The Killers | Lizard King | [29] |
| 24 July | [30] | |||
| 31 July | [31] | |||
| 7 August | The Dangermen Sessions Vol. 1 | Madness | V2 | [32] |
| 14 August | Get Behind Me Satan | The White Stripes | XL | [33] |
| 21 August | Capture/Release | The Rakes | V2 | [34] |
| 28 August | Howl | Black Rebel Motorcycle Club | XL | [35] |
| 11 September | I Am a Bird Now | Antony & The Johnsons | Secretly Canadian | [36] |
| 18 September | Leaders of the Free World | Elbow | V2 | [37] |
| 25 September | I Am A Bird Now | Anthony & The Johnsons | Secretly Canadian | [38] |
| 2 October | Piece by Piece | Katie Melua | Dramatico | [39] |
| 9 October | You Could Have It So Much Better | Franz Ferdinand | Domino | [40] |
| 16 October | As Is Now | Paul Weller | Yep Roc | [41] |
| 23 October | Their Law: The Singles 1990–2005 | The Prodigy | XL | [42] |
| 30 October | [43] | |||
| 6 November | [44] | |||
| 13 November | [45] | |||
| 20 November | Down In Albion | Babyshambles | Rough trade | [46] |
| 27 November | Their Law: The Singles 1990–2005 | The Prodigy | XL | [47] |
| 4 December | [48] | |||
| 11 December | Piece By Piece | Katie Melua | Dramatico | [49] |
| 18 December | [50] | |||
| 25 December | [51] |