List of number-one singles of 1981 (Ireland)
This is a list of singles which have reached number one on the Irish Singles Chart in 1981.
| Week ending | Song | Artist |
|---|---|---|
| 3 January | There's No-one Quite Like Grandma | St Winifred's School Choir |
| 10 January | (Just Like) Starting Over | John Lennon |
| 17 January | ||
| 24 January | ||
| 31 January | Imagine | |
| 7 February | Woman | |
| 14 February | ||
| 21 February | ||
| 28 February | Shaddap You Face | Joe Dolce |
| 7 March | ||
| 14 March | ||
| 21 March | Vienna | Ultravox |
| 28 March | More and More | Joe Dolan 
|
| 4 April | This Ole House | Shakin' Stevens |
| 11 April | ||
| 18 April | ||
| 25 April | Making Your Mind Up | Bucks Fizz |
| 2 May | ||
| 9 May | Stars on 45 | Starsound |
| 16 May | ||
| 23 May | You Drive Me Crazy | Shakin' Stevens |
| 30 May | ||
| 6 June | ||
| 13 June | ||
| 20 June | ||
| 27 June | ||
| 4 July | One Day in Your Life | Michael Jackson |
| 11 July | ||
| 18 July | When You Were Sweet Sixteen | The Fureys and Davy Arthur
|
| 25 July | The Streets of New York | Wolfe Tones
|
| 1 August | ||
| 8 August | ||
| 15 August | Green Door | Shakin' Stevens |
| 22 August | ||
| 29 August | ||
| 5 September | ||
| 12 September | A Bunch of Thyme | Foster and Allen
|
| 19 September | Japanese Boy | Aneka |
| 26 September | Prince Charming | Adam and the Ants |
| 3 October | ||
| 10 October | Hands Up (Give Me Your Heart) | Ottawan |
| 17 October | ||
| 24 October | It's My Party | Dave Stewart and Barbara Gaskin |
| 31 October | ||
| 7 November | ||
| 14 November | ||
| 21 November | Every Little Thing She Does is Magic | The Police |
| 28 November | Begin the Beguine | Julio Iglesias |
| 5 December | ||
| 12 December | ||
| 19 December | Don't You Want Me | The Human League |
| 26 December | One of Us | ABBA |
- 24 Number Ones
- Most weeks at No.1 (song): "You Drive Me Crazy" - Shakin' Stevens (6)
- Most weeks at Number One (artist): Shakin' Stevens (13)
- Most No.1s: John Lennon, Shakin' Stevens (3)