The Irish Singles Chart ranks the best-performing singles in Ireland, as compiled by Chart-Track on behalf of the Irish Recorded Music Association.
| Issue date | Song | Artist | Reference |
|---|---|---|---|
| 2 January | "Happy" | Pharrell Williams | [1] |
| 9 January | [2] | ||
| 16 January | [3] | ||
| 23 January | [4] | ||
| 30 January | [5] | ||
| 6 February | [6] | ||
| 13 February | [7] | ||
| 20 February | "Rather Be" | Clean Bandit featuring Jess Glynne | [8] |
| 27 February | [9] | ||
| 6 March | "Happy" | Pharrell Williams | [10] |
| 13 March | [11] | ||
| 20 March | "I Got U" | Duke Dumont featuring Jax Jones | [12] |
| 27 March | "She Looks So Perfect" | 5 Seconds of Summer | [13] |
| 3 April | "Happy" | Pharrell Williams | [14] |
| 10 April | [15] | ||
| 17 April | [16] | ||
| 24 April | "All of Me" | John Legend | [17] |
| 1 May | "Summer" | Calvin Harris | [18] |
| 8 May | "All of Me" | John Legend | [19] |
| 15 May | "Sing" | Ed Sheeran | [20] |
| 22 May | "Stay with Me" | Sam Smith | [21] |
| 29 May | [22] | ||
| 5 June | [23] | ||
| 12 June | "Ghost" | Ella Henderson | [24] |
| 19 June | "Don't Stop" | 5 Seconds of Summer | [25] |
| 26 June | "Ghost" | Ella Henderson | [26] |
| 3 July | "Problem" | Ariana Grande featuring Iggy Azalea | [27] |
| 10 July | "Ghost" | Ella Henderson | [28] |
| 17 July | [29] | ||
| 24 July | "Crazy Stupid Love" | Cheryl Cole featuring Tinie Tempah | [30] |
| 31 July | "Ghost" | Ella Henderson | [31] |
| 7 August | [32] | ||
| 14 August | "Stolen Dance" | Milky Chance | [33] |
| 21 August | [34] | ||
| 28 August | "Prayer in C" | Lilly Wood and the Prick and Robin Schulz | [35] |
| 4 September | "Superheroes" | The Script | [36] |
| 11 September | "Prayer in C" | Lilly Wood and the Prick and Robin Schulz | [37] |
| 18 September | [38] | ||
| 25 September | [39] | ||
| 2 October | "All About That Bass" | Meghan Trainor | [40] |
| 9 October | [41] | ||
| 16 October | [42] | ||
| 23 October | [43] | ||
| 30 October | "Thinking Out Loud" | Ed Sheeran | [44] |
| 6 November | [45] | ||
| 13 November | [46] | ||
| 20 November | "Do They Know It's Christmas? (2014)" | Band Aid 30 | [47] |
| 27 November | [48] | ||
| 4 December | "Where I Belong" | Hometown | [49] |
| 11 December | "Do They Know It's Christmas? (2014)" | Band Aid 30 | [50] |
| 18 December | "Uptown Funk" | Mark Ronson featuring Bruno Mars | [51] |
| 25 December | [52] |
| Position | Artist | Weeks at No. 1 |
|---|---|---|
| 1 | Pharrell Williams | 12 |
| 2 | Ella Henderson | 6 |
| 3 | Lilly Wood and the Prick | 4 |
| Robin Schulz | ||
| Meghan Trainor | ||
| Ed Sheeran | ||
| 7 | Band Aid 30 | 3 |
| Sam Smith | ||
| 9 | Clean Bandit | 2 |
| Jess Glynne | ||
| John Legend | ||
| 5 Seconds of Summer | ||
| Milky Chance | ||
| Mark Ronson | ||
| Bruno Mars | ||
| 16 | Duke Dumont | 1 |
| Jax Jones | ||
| Calvin Harris | ||
| Ariana Grande | ||
| Iggy Azalea | ||
| Cheryl Cole | ||
| Tinie Tempah | ||
| The Script | ||
| Hometown |