The following is a list of the IRMA's number-one singles of 1997. The dates shown below are Sundays.
| Issue Date | Song | Artist |
|---|---|---|
| 3 January | "2 Become 1" | Spice Girls |
| 10 January | ||
| 17 January | ||
| 24 January | "Where Do You Go" | No Mercy |
| 31 January | "I Finally Found Someone" | Barbra Streisand & Bryan Adams |
| 7 February | "Discothèque" | U2 |
| 14 February | ||
| 21 February | "Don't Speak" | No Doubt |
| 28 February | ||
| 7 March | ||
| 14 March | "Mama"/"Who Do You Think You Are" | Spice Girls |
| 21 March | ||
| 28 March | ||
| 4 April | ||
| 11 April | "Encore Une Fois" | Sash! |
| 18 April | "I Believe I Can Fly" | R. Kelly |
| 25 April | ||
| 2 May | ||
| 9 May | ||
| 16 May | ||
| 23 May | "Con Te Partiro (Time to Say Goodbye)" | Sarah Brightman & Andrea Bocelli |
| 30 May | ||
| 6 June | ||
| 13 June | "MMMBop" | Hanson |
| 20 June | ||
| 27 June | ||
| 4 July | "I'll Be Missing You" | Puff Daddy & Faith Evans feat. 112 |
| 11 July | "D'You Know What I Mean?" | Oasis |
| 18 July | ||
| 25 July | "I'll Be Missing You" | Puff Daddy & Faith Evans feat. 112 |
| 1 August | ||
| 8 August | ||
| 15 August | ||
| 22 August | "Men In Black" | Will Smith |
| 29 August | ||
| 5 September | ||
| 12 September | "Tubthumping" | Chumbawamba |
| 19 September | "Candle in the Wind 1997"/"Something About The Way You Look Tonight" | Elton John |
| 26 September | ||
| 3 October | ||
| 10 October | ||
| 17 October | ||
| 24 October | "Barbie Girl" | Aqua |
| 31 October | ||
| 7 November | ||
| 14 November | ||
| 21 November | "Good Looking Woman" | Dustin & Joe Dolan |
| 28 November | "Perfect Day" | Various Artists |
| 4 December | ||
| 11 December | ||
| 18 December | ||
| 25 December |