List of number-one singles of 1979 (Ireland)
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This is a list of singles which have reached number one on the Irish Singles Chart in 1979.
| class="wikitable"
! Week ending | Song | Artist
!Ref. |
| 6 January | align="center" | "Mary's Boy Child / Oh My Lord" | align="center" | Boney M
| |
| 13 January | rowspan="4" align="center" | "Y.M.C.A." | rowspan="4" align="center" | Village People
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| 20 January
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| 27 January
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| 3 February
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| 10 February | rowspan="3" align="center" | "Chiquitita" | rowspan="3" align="center" | ABBA
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| 17 February
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| 24 February
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| 3 March | rowspan="2" align="center" | "Tragedy" | rowspan="2" align="center" | The Bee Gees
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| 10 March
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| 17 March | rowspan="4" align="center" | "I Will Survive" | rowspan="4" align="center" | Gloria Gaynor
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| 24 March
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| 31 March
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| 7 April
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| 14 April | rowspan="3" align="center" | "Bright Eyes" | rowspan="3" align="center" | Art Garfunkel
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| 21 April
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| 28 April
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| 5 May | align="center" | "Hallelujah" | align="center" | Milk and Honey
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| 12 May | rowspan="2" align="center" | "Bright Eyes" | rowspan="2" align="center" | Art Garfunkel |
| 19 May
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| 26 May | rowspan="4" align="center" | "Sunday Girl" | rowspan="4" align="center" | Blondie
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| 2 June
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| 9 June
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| 16 June
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| 23 June | align="center" | "Dance Away" | align="center" | Roxy Music
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| 30 June | rowspan="4" align="center" | "Do You Want Your Old Lobby Washed Down, Con Shine" | rowspan="4" align="center" | Brendan Shine
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| 7 July
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| 14 July
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| 21 July
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| 28 July | rowspan="1" align="center" | "Green Fields Of France" | rowspan="1" align="center" | The Furey Brothers & Davey Arthur
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| 4 August | rowspan="4" align="center" | "I Don't Like Mondays" | rowspan="4" align="center" | The Boomtown Rats
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| 11 August
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| 18 August
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| 25 August
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| 1 September | rowspan="4" align="center" | "We Don't Talk Anymore" | rowspan="4" align="center" | Cliff Richard
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| 8 September
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| 15 September
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| 22 September
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| 29 September | align="center" | "Viva IL Papa" | align="center" | Caitriona Walsh
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| 6 October | rowspan="2" align="center" | "Welcome John Paul II" | rowspan="2" align="center" | Jim Tobin
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| 13 October
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| 20 October | align="center" | "Message in a Bottle" | align="center" | The Police
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| 27 October | rowspan="2" align="center" | "Video Killed the Radio Star" | rowspan="2" align="center" | The Buggles
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| 3 November
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| 10 November | align="center" | "Gimme! Gimme! Gimme! (A Man After Midnight)" | align="center" | ABBA
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| 17 November | rowspan="3" align="center" | "When You're in Love with a Beautiful Woman" | rowspan="3" align="center" | Dr. Hook
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| 24 November
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| 1 December
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| 8 December | align="center" | "Walking on the Moon" | align="center" | The Police
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| 15 December | rowspan="3" align="center" | "Another Brick in the Wall (Part 2)" | rowspan="3" align="center" | Pink Floyd
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| 22 December
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| 29 December
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- 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