The following is a list of the IRMAs number-one singles of 2002.
| Issue date | Song | Artist |
|---|---|---|
| 5 January | "What If" | Kate Winslet |
| 12 January | ||
| 19 January | ||
| 26 January | "Get the Party Started" | Pink |
| 2 February | "Hero" | Enrique Iglesias |
| 9 February | ||
| 16 February | "There's a Whole Lotta Lovin'" | Six |
| 23 February | ||
| 2 March | ||
| 9 March | ||
| 16 March | "Whenever, Wherever" | Shakira |
| 23 March | "Unchained Melody" | Gareth Gates |
| 30 March | ||
| 6 April | ||
| 13 April | "How You Remind Me" | Nickelback |
| 20 April | ||
| 27 April | ||
| 4 May | ||
| 11 May | ||
| 18 May | "Here Come the Good Times" | Ireland World Cup Squad featuring various |
| 25 May | "Without Me" | Eminem |
| 1 June | ||
| 8 June | ||
| 15 June | "A Little Less Conversation" | Elvis Presley vs. JXL |
| 22 June | ||
| 29 June | ||
| 6 July | "Let Me Be The One" | Six |
| 13 July | ||
| 20 July | "The Logical Song" | Scooter |
| 27 July | "Underneath Your Clothes" | Shakira |
| 3 August | ||
| 10 August | ||
| 17 August | ||
| 24 August | "Like a Prayer" | Mad'House |
| 31 August | "The Tide Is High (Get The Feeling)" | Atomic Kitten |
| 7 September | ||
| 14 September | ||
| 21 September | ||
| 28 September | "Complicated" | Avril Lavigne |
| 5 October | ||
| 12 October | "Aserejé (The Ketchup Song)" | Las Ketchup |
| 19 October | "Dilemma" | Nelly featuring Kelly Rowland |
| 25 October | ||
| 2 November | ||
| 9 November | "Unbreakable" | Westlife |
| 16 November | "Aserejé (The Ketchup Song)" | Las Ketchup |
| 23 November | ||
| 30 November | "Dirrty" | Christina Aguilera featuring Redman |
| 7 December | "Lose Yourself" | Eminem |
| 14 December | ||
| 21 December | ||
| 28 December |