This is a list of singles which have reached number one on the Irish Singles Chart in 1974.
| Issue Date | Song | Artist |
|---|---|---|
| 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" | Tina |
| 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 |