The following is a list of the IRMAs number-one singles of 1993.
| Issue Date | Song | Artist | Ref. |
|---|---|---|---|
| 3 January | "I Will Always Love You" | Whitney Houston | |
| 10 January | |||
| 17 January | |||
| 24 January | "This Time" / "Life Without You" | Chris Moore | |
| 31 January | |||
| 7 February | |||
| 14 February | |||
| 21 February | |||
| 28 February | "No Limit" | 2 Unlimited | |
| 7 March | |||
| 14 March | |||
| 21 March | |||
| 28 March | |||
| 4 April | "Oh Carolina" | Shaggy | |
| 11 April | "Young at Heart" | The Bluebells | |
| 18 April | |||
| 25 April | "Informer" | Snow | |
| 2 May | Five Live (EP) | George Michael & Queen with Lisa Stansfield | |
| 9 May | |||
| 16 May | |||
| 23 May | "In Your Eyes" | Niamh Kavanagh | |
| 30 May | |||
| 6 June | |||
| 13 June | |||
| 20 June | |||
| 27 June | "What Is Love" | Haddaway | |
| 4 July | |||
| 11 July | |||
| 18 July | "What's Up?" | 4 Non Blondes | |
| 25 July | |||
| 1 August | |||
| 8 August | |||
| 15 August | |||
| 22 August | "Living On My Own" | Freddie Mercury | |
| 29 August | "Mr. Vain" | Culture Beat | |
| 5 September | [1] | ||
| 12 September | |||
| 19 September | |||
| 26 September | |||
| 3 October | "Go West" | Pet Shop Boys | |
| 10 October | "Boom! Shake the Room" | DJ Jazzy Jeff & The Fresh Prince | |
| 17 October | "I'd Do Anything for Love (But I Won't Do That)" | Meat Loaf | |
| 24 October | |||
| 31 October | |||
| 7 November | |||
| 14 November | |||
| 21 November | |||
| 28 November | "Please Forgive Me" | Bryan Adams | |
| 5 December | "Stay (Faraway, So Close!)" | U2 | |
| 12 December | |||
| 19 December | "Babe" | Take That | |
| 26 December |