# List of number-one singles of 1979 (Ireland)

This is a list of singles which have reached number one on the Irish Singles Chart in 1979.
| Week ending | Song | Artist |
| 6 January | "Mary's Boy Child / Oh My Lord" | Boney M |
| 13 January | "Y.M.C.A." | Village People |
| 20 January | "Y.M.C.A." | Village People |
| 27 January | "Y.M.C.A." | Village People |
| 3 February | "Y.M.C.A." | Village People |
| 10 February | "Chiquitita" | ABBA |
| 17 February | "Chiquitita" | ABBA |
| 24 February | "Chiquitita" | ABBA |
| 3 March | "Tragedy" | The Bee Gees |
| 10 March | "Tragedy" | The Bee Gees |
| 17 March | "I Will Survive" | Gloria Gaynor |
| 24 March | "I Will Survive" | Gloria Gaynor |
| 31 March | "I Will Survive" | Gloria Gaynor |
| 7 April | "I Will Survive" | Gloria Gaynor |
| 14 April | "Bright Eyes" | Art Garfunkel |
| 21 April | "Bright Eyes" | Art Garfunkel |
| 28 April | "Bright Eyes" | Art Garfunkel |
| 5 May | "Hallelujah" | Milk and Honey |
| 12 May | "Bright Eyes" | Art Garfunkel |
| 19 May | "Bright Eyes" | Art Garfunkel |
| 26 May | "Sunday Girl" | Blondie |
| 2 June | "Sunday Girl" | Blondie |
| 9 June | "Sunday Girl" | Blondie |
| 16 June | "Sunday Girl" | Blondie |
| 23 June | "Dance Away" | Roxy Music |
| 30 June | "Do You Want Your Old Lobby Washed Down, Con Shine" | Brendan Shine |
| 7 July | "Do You Want Your Old Lobby Washed Down, Con Shine" | Brendan Shine |
| 14 July | "Do You Want Your Old Lobby Washed Down, Con Shine" | Brendan Shine |
| 21 July | "Do You Want Your Old Lobby Washed Down, Con Shine" | Brendan Shine |
| 28 July | "Green Fields Of France" | The Furey Brothers & Davey Arthur |
| 4 August | "I Don't Like Mondays" | The Boomtown Rats |
| 11 August | "I Don't Like Mondays" | The Boomtown Rats |
| 18 August | "I Don't Like Mondays" | The Boomtown Rats |
| 25 August | "I Don't Like Mondays" | The Boomtown Rats |
| 1 September | "We Don't Talk Anymore" | Cliff Richard |
| 8 September | "We Don't Talk Anymore" | Cliff Richard |
| 15 September | "We Don't Talk Anymore" | Cliff Richard |
| 22 September | "We Don't Talk Anymore" | Cliff Richard |
| 29 September | "Viva Il Papa" | Caitriona Walsh |
| 6 October | "Welcome John Paul II" | Jim Tobin |
| 13 October | "Welcome John Paul II" | Jim Tobin |
| 20 October | "Message in a Bottle" | The Police |
| 27 October | "Video Killed the Radio Star" | The Buggles |
| 3 November | "Video Killed the Radio Star" | The Buggles |
| 10 November | "Gimme! Gimme! Gimme! (A Man After Midnight)" | ABBA |
| 17 November | "When You're in Love with a Beautiful Woman" | Dr. Hook |
| 24 November | "When You're in Love with a Beautiful Woman" | Dr. Hook |
| 1 December | "When You're in Love with a Beautiful Woman" | Dr. Hook |
| 8 December | "Walking on the Moon" | The Police |
| 15 December | "Another Brick in the Wall (Part 2)" | Pink Floyd |
| 22 December | "Another Brick in the Wall (Part 2)" | Pink Floyd |
| 29 December | "Another Brick in the Wall (Part 2)" | Pink Floyd |
* 21 Number Ones
* Most weeks at No.1 (song): "Bright Eyes" - Art Garfunkel
* Most weeks at No.1 (artist): Art Garfunkel
* Most No.1s: Abba (2), The Police (2)
* Two songs about the visit by Pope John Paul II to Ireland reached No. 1