This is a list of singles which have reached number one on the Irish Singles Chart in 1986.
| Week ending | Song | Artist | | 4 January | Thank You Very Much Mr Eastwood | Dermot Morgan {{flagicon|Ireland}} |
| 11 January |
| 18 January | The Sun Always Shines on T.V. | a-ha |
| 25 January | Walk of Life | Dire Straits |
| 1 February | Borderline | Madonna |
| 8 February | Only Love | Nana Mouskouri |
| 15 February | When the Going Gets Tough, the Tough Get Going | Billy Ocean |
| 22 February |
| 1 March | Chain Reaction | Diana Ross |
| 8 March |
| 15 March | Absolute Beginners | David Bowie |
| 22 March |
| 29 March | Living Doll | Cliff Richard and The Young Ones |
| 5 April |
| 12 April |
| 19 April |
| 26 April | Rock Me Amadeus | Falco |
| 3 May | Look Away | Big Country |
| 10 May | Make It Work | Christy Moore, Paul Doran and the Self Aid Band {{flagicon|Ireland}} |
| 17 May | The Chicken Song | Spitting Image |
| 24 May |
| 31 May | Rollin' Home | Status Quo |
| 7 June | Holding Back the Years | Simply Red |
| 14 June | Spirit in the Sky | Doctor and the Medics |
| 21 June | The Edge of Heaven | Wham! |
| 28 June | Papa Don't Preach | Madonna |
| 5 July |
| 12 July | The Lady in Red | Chris de Burgh {{flagicon|Ireland}} |
| 19 July |
| 26 July |
| 2 August |
| 9 August |
| 16 August |
| 23 August |
| 30 August | I Want to Wake Up with You | Boris Gardiner |
| 6 September |
| 13 September | Don't Leave Me This Way | The Communards |
| 20 September |
| 27 September |
| 4 October | True Blue | Madonna |
| 11 October |
| 18 October | In the Army Now | Status Quo |
| 25 October | All I Ask of You | Cliff Richard and Sarah Brightman |
| 1 November | Take My Breath Away | Berlin |
| 8 November |
| 15 November |
| 22 November |
| 29 November | The Final Countdown | Europe |
| 6 December |
| 13 December | Caravan of Love | The Housemartins |
| 20 December |
| 27 December |
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