This is a list of singles which have reached number one on the Irish Singles Chart in 1986.
| Week ending | Song | Artist | Ref. |
|---|---|---|---|
| 4 January | "Thank You Very Much Mr Eastwood" | Dermot Morgan | |
| 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" | ||
| 3 May | "Look Away" | ||
| 10 May | "Make It Work" | Christy Moore, Paul Doran and the Self Aid Band | |
| 17 May | "The Chicken Song" | ||
| 24 May | |||
| 31 May | "Rollin' Home" | ||
| 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 | |
| 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" | ||
| 1 November | "Take My Breath Away" | ||
| 8 November | |||
| 15 November | |||
| 22 November | |||
| 29 November | "The Final Countdown" | Europe | |
| 6 December | |||
| 13 December | "Caravan of Love" | The Housemartins | |
| 20 December | [1] | ||
| 27 December |