This is a list of singles which have reached number one on the Irish Singles Chart in 1974.
| Issue Date | Song | Artist | Ref. |
|---|---|---|---|
| 3 January | "Merry Xmas Everybody" | Slade | |
| 10 January | "I'm Gonna Make It" | Joe Cuddy | |
| 17 January | |||
| 24 January | "You Won't Find Another Fool Like Me" | The New Seekers featuring Lyn Paul | |
| 31 January | "Tiger Feet" | Mud | |
| 7 February | |||
| 14 February | "Teenage Rampage" | Sweet | |
| 21 February | |||
| 28 February | "Devil Gate Drive" | Suzi Quatro | |
| 7 March | "Jealous Mind" | Alvin Stardust | |
| 14 March | |||
| 21 March | "Cross Your Heart" | [1] | |
| 28 March | |||
| 4 April | "Billy Don't Be a Hero" | Paper Lace | |
| 11 April | "Cross Your Heart" | Tina | |
| 18 April | "Seasons in the Sun" | Terry Jacks | |
| 25 April | "Waterloo" | ABBA | |
| 2 May | |||
| 9 May | "Any Dream Will Do" | Joe Cuddy | |
| 16 May | |||
| 23 May | |||
| 30 May | "I See a Star" | Mouth & McNeal | |
| 6 June | "Any Dream Will Do" | Joe Cuddy | |
| 13 June | |||
| 20 June | "I See a Star" | Mouth & McNeal | |
| 27 June | "Always Yours" | Gary Glitter | |
| 4 July | |||
| 11 July | "Old Love Letters" | Big Tom | |
| 18 July | "She" | Charles Aznavour | |
| 25 July | "If Ma Could See Me Now" | The Times | |
| 1 August | |||
| 8 August | |||
| 15 August | |||
| 22 August | "Abbeyshrule" | Brendan Shine | |
| 29 August | |||
| 5 September | |||
| 12 September | "19 Men" | Dermot Hegarty | |
| 19 September | |||
| 26 September | |||
| 3 October | "Kung Fu Fighting" | Carl Douglas | |
| 10 October | |||
| 17 October | "Annie's Song" | John Denver | |
| 24 October | |||
| 31 October | "Everything I Own" | Ken Boothe | |
| 7 November | |||
| 14 November | |||
| 21 November | "Gonna Make You a Star" | David Essex | |
| 28 November | |||
| 5 December | |||
| 12 December | |||
| 19 December | "Oh Yes! You're Beautiful" | Gary Glitter | |
| 26 December |