# List of number-one singles of 1985 (Ireland)

This is a list of singles which have reached number one on the Irish Singles Chart in 1985.
| Week ending | Song | Artist |
| 5 January | "Do They Know It's Christmas?" | Band Aid |
| 12 January | "Do They Know It's Christmas?" | Band Aid |
| 19 January | "Do They Know It's Christmas?" | Band Aid |
| 26 January | "I Want to Know What Love Is" | Foreigner |
| 2 February | "I Want to Know What Love Is" | Foreigner |
| 9 February | "I Know Him So Well" | Elaine Paige and Barbara Dickson |
| 16 February | "I Know Him So Well" | Elaine Paige and Barbara Dickson |
| 23 February | "I Know Him So Well" | Elaine Paige and Barbara Dickson |
| 2 March | "I Know Him So Well" | Elaine Paige and Barbara Dickson |
| 9 March | "I Know Him So Well" | Elaine Paige and Barbara Dickson |
| 16 March | "You Spin Me Round (Like a Record)" | Dead or Alive |
| 23 March | "Easy Lover" | Philip Bailey and Phil Collins |
| 30 March | "Easy Lover" | Philip Bailey and Phil Collins |
| 23 March | "Show Some Concern" | The Concerned |
| 30 March | "Show Some Concern" | The Concerned |
| 6 April | "Show Some Concern" | The Concerned |
| 13 April | "We are the World" | USA for Africa |
| 20 April | "We are the World" | USA for Africa |
| 27 April | "We are the World" | USA for Africa |
| 4 May | "We are the World" | USA for Africa |
| 11 May | "The Unforgettable Fire" | U2 |
| 18 May | "The Unforgettable Fire" | U2 |
| 25 May | "19" | Paul Hardcastle |
| 1 June | "19" | Paul Hardcastle |
| 8 June | "I'm on Fire" / "Born in the U.S.A." | Bruce Springsteen |
| 15 June | "I'm on Fire" / "Born in the U.S.A." | Bruce Springsteen |
| 22 June | "You'll Never Walk Alone" | The Crowd |
| 29 June | "Frankie" | Sister Sledge |
| 6 July | "Frankie" | Sister Sledge |
| 13 July | "Frankie" | Sister Sledge |
| 20 July | "Frankie" | Sister Sledge |
| 27 July | "Axel F" | Harold Faltermeyer |
| 3 August | "There Must Be an Angel (Playing with My Heart)" | Eurythmics |
| 10 August | "Into the Groove" | Madonna |
| 17 August | "Into the Groove" | Madonna |
| 24 August | "Into the Groove" | Madonna |
| 31 August | "I Got You Babe" | UB40 with Chrissie Hynde |
| 7 September | "I Got You Babe" | UB40 with Chrissie Hynde |
| 14 September | "Dancing in the Street" | David Bowie and Mick Jagger |
| 21 September | "Dancing in the Street" | David Bowie and Mick Jagger |
| 28 September | "Holding Out for a Hero" | Bonnie Tyler |
| 5 October | "Part-Time Lover" | Stevie Wonder |
| 12 October | "If I Was" | Midge Ure |
| 19 October | "The Power of Love" | Jennifer Rush |
| 26 October | "The Power of Love" | Jennifer Rush |
| 2 November | "The Power of Love" | Jennifer Rush |
| 9 November | "The Power of Love" | Jennifer Rush |
| 16 November | "Nikita" | Elton John |
| 23 November | "A Good Heart" | Feargal Sharkey |
| 30 November | "A Good Heart" | Feargal Sharkey |
| 7 December | "I'm Your Man" | Wham! |
| 14 December | "Separate Lives" | Phil Collins and Marilyn Martin |
| 21 December | "Saving All My Love for You" | Whitney Houston |
| 28 December | "Thank You Very Much Mr. Eastwood" | Dermot Morgan |
* 26 Number Ones
* Most weeks at No.1 (song): "I Know Him so Well" - Elaine Paige and Barbara Dickson (5)
* Most weeks at No.1 (artist): Elaine Paige and Barbara Dickson (5)
* Most No.1s: Phil Collins (2 shared No.1s)
* NOTE: There were 4 Various Artist No. 1s this year (Band Aid, The Concerned, USA for Africa and The Crowd)