This is a list of singles which topped the Irish Singles Chart in 1971.
Note that prior to 1992, the Irish singles chart was compiled from trade shipments from the labels to record stores, rather than on consumer sales. The chart date moved from Friday to Saturday in late January, and then to Thursday in early August.
| Issue Date | Song | Artist | Ref. |
|---|---|---|---|
| 1 January | "If Those Lips Could Only Speak" | Dermot Henry | |
| 8 January | |||
| 15 January | |||
| 23 January | |||
| 30 January | "My Sweet Lord" | George Harrison | [1] |
| 6 February | |||
| 13 February | |||
| 20 February | |||
| 27 February | |||
| 6 March | |||
| 13 March | |||
| 20 March | "Another Day" | Paul McCartney | |
| 27 March | "Rose Garden" | Lynn Anderson | |
| 3 April | "Hot Love" | T. Rex | |
| 10 April | "When We Were Young" | Pat Lynch | |
| 17 April | "Rose Garden" | Lynn Anderson | |
| 24 April | |||
| 1 May | "Hot Love" | T. Rex | |
| 8 May | "Un banc, un arbre, une rue" | Séverine | |
| 15 May | |||
| 22 May | |||
| 29 May | |||
| 5 June | "I Am, I Said" | Neil Diamond | |
| 12 June | |||
| 19 June | "O'Brien Has No Place To Go" | Brendan Shine | |
| 26 June | |||
| 3 July | |||
| 10 July | "Chirpy Chirpy Cheep Cheep" | Middle of the Road | |
| 17 July | |||
| 24 July | |||
| 31 July | "Sometimes" | Red Hurley | |
| 5 August | |||
| 12 August | "Get It On" | T. Rex | |
| 19 August | |||
| 26 August | "Never Ending Song of Love" | The New Seekers | |
| 2 September | |||
| 9 September | |||
| 16 September | "I'm Still Waiting" | Diana Ross | |
| 23 September | "What Are You Doing Sunday" | Dawn | |
| 30 September | "Hey Girl Don't Bother Me" | The Tams | |
| 7 October | "Did You Ever" | Nancy and Lee | |
| 14 October | |||
| 21 October | |||
| 28 October | |||
| 4 November | |||
| 11 November | |||
| 18 November | "Kiss Me Goodbye" | Red Hurley | |
| 25 November | "Coz I Luv You" | Slade | |
| 2 December | "Kiss Me Goodbye" | Red Hurley | |
| 9 December | "I Don't Know How to Love Him" | Tina & Real McCoy | |
| 16 December | |||
| 23 December | "O Holy Night" | Tommy Drennan and the Monarchs | |
| 30 December |