List of number-one singles of 1990 (Ireland)
The following is a list of the IRMA's number-one singles of 1990.
| Issue Date | Song | Artist |
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| 4 January | Do They Know It's Christmas? | Band Aid II |
| 11 January | Do They Know It's Christmas? | Band Aid II |
| 18 January | Hangin' Tough | New Kids On The Block |
| 25 January | Nothing Compares 2 U | Sinéad O'Connor |
| 1 February | Nothing Compares 2 U | Sinéad O'Connor |
| 8 February | Nothing Compares 2 U | Sinéad O'Connor |
| 15 February | Nothing Compares 2 U | Sinéad O'Connor |
| 22 February | Nothing Compares 2 U | Sinéad O'Connor |
| 1 March | Nothing Compares 2 U | Sinéad O'Connor |
| 8 March | Love Shack | The B-52's |
| 15 March | Brits Mix 1990 | Various Artists |
| 22 March | That Sounds Good To Me | Jive Bunny & The Mastermixers |
| 29 March | That Sounds Good To Me | Jive Bunny & The Mastermixers |
| 5 April | The By-road to Glenroe | Mick Lally |
| 12 April | The By-road to Glenroe | Mick Lally |
| 19 April | The By-road to Glenroe | Mick Lally |
| 26 April | The By-road to Glenroe | Mick Lally |
| 3 May | The By-road to Glenroe | Mick Lally |
| 10 May | Give It A Lash Jack | Liam Harrison & The Goal Celebrities |
| 17 May | The Game | The Memories |
| 24 May | Give It A Lash Jack | Liam Harrison & The Goal Celebrities |
| 31 May | Put 'Em Under Pressure | The Republic of Ireland Football Squad |
| 7 June | Put 'Em Under Pressure | The Republic of Ireland Football Squad |
| 14 June | Put 'Em Under Pressure | The Republic of Ireland Football Squad |
| 21 June | Put 'Em Under Pressure | The Republic of Ireland Football Squad |
| 28 June | Put 'Em Under Pressure | The Republic of Ireland Football Squad |
| 5 July | Put 'Em Under Pressure | The Republic of Ireland Football Squad |
| 12 July | Put 'Em Under Pressure | The Republic of Ireland Football Squad |
| 19 July | Put 'Em Under Pressure | The Republic of Ireland Football Squad |
| 26 July | Put 'Em Under Pressure | The Republic of Ireland Football Squad |
| 2 August | Put 'Em Under Pressure | The Republic of Ireland Football Squad |
| 9 August | Put 'Em Under Pressure | The Republic of Ireland Football Squad |
| 16 August | Put 'Em Under Pressure | The Republic of Ireland Football Squad |
| 23 August | Put 'Em Under Pressure | The Republic of Ireland Football Squad |
| 30 August | Itsy Bitsy Teeny Weeny Yellow Polka Dot Bikini | Bombalurina |
| 6 September | The Joker | The Steve Miller Band |
| 13 September | The Joker | The Steve Miller Band |
| 20 September | I Useta Lover | The Saw Doctors |
| 27 September | I Useta Lover | The Saw Doctors |
| 4 October | I Useta Lover | The Saw Doctors |
| 11 October | I Useta Lover | The Saw Doctors |
| 18 October | I Useta Lover | The Saw Doctors |
| 25 October | I Useta Lover | The Saw Doctors |
| 1 November | I Useta Lover | The Saw Doctors |
| 8 November | Unchained Melody | The Righteous Brothers |
| 15 November | Unchained Melody | The Righteous Brothers |
| 22 November | Ooh Aah Paul McGrath | Watch Your House |
| 29 November | Ooh Aah Paul McGrath | Watch Your House |
| 6 December | Ice Ice Baby | Vanilla Ice |
| 13 December | The Christmas No 1 | Zig and Zag |
| 20 December | The Christmas No 1 | Zig and Zag |
| 27 December | The Christmas No 1 | Zig and Zag |
- 18 number ones
- Most number ones: All artists one number one
- Most weeks at number one (single): "Put 'Em Under Pressure" - The Republic of Ireland Football Squad (13 weeks)
- Most weeks at number one (artist): The Republic of Ireland Football Squad (13 weeks)
See also
Irish music charts |
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| | Charts | |
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| | Number-one singles | |
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| | Number-one albums | |
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| | Top 10 singles | |
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| | Top selling | |
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| | Dance | |
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