# List of number-one singles of 2020 (Ireland)

The Irish Singles Chart ranks the best-performing singles in Ireland, as compiled by the Official Charts Company on behalf of the Irish Recorded Music Association.
| Issue date | Song | Artist(s) |
| 3 January | "Before You Go" | Lewis Capaldi |
| 10 January | "Before You Go" | Lewis Capaldi |
| 17 January | "Before You Go" | Lewis Capaldi |
| 24 January | "Godzilla" | Eminem featuring Juice Wrld |
| 31 January | "Blinding Lights" | The Weeknd |
| 7 February | "Blinding Lights" | The Weeknd |
| 14 February | "Blinding Lights" | The Weeknd |
| 21 February | "No Time to Die" | Billie Eilish |
| 28 February | "Blinding Lights" | The Weeknd |
| 6 March | "Roses" | Saint Jhn |
| 13 March | "Roses" | Saint Jhn |
| 20 March | "Roses" | Saint Jhn |
| 27 March | "Roses" | Saint Jhn |
| 3 April | "Roses" | Saint Jhn |
| 10 April | "Roses" | Saint Jhn |
| 17 April | "Roses" | Saint Jhn |
| 24 April | "Roses" | Saint Jhn |
| 1 May | "Toosie Slide" | Drake |
| 8 May | "Toosie Slide" | Drake |
| 15 May | "Rockstar" | DaBaby featuring Roddy Ricch |
| 22 May | "Rockstar" | DaBaby featuring Roddy Ricch |
| 29 May | "Rain on Me" | Lady Gaga and Ariana Grande |
| 5 June | "Rockstar" | DaBaby featuring Roddy Ricch |
| 12 June | "Rockstar" | DaBaby featuring Roddy Ricch |
| 19 June | "Rockstar" | DaBaby featuring Roddy Ricch |
| 26 June | "Rockstar" | DaBaby featuring Roddy Ricch |
| 3 July | "Rockstar" | DaBaby featuring Roddy Ricch |
| 10 July | "Rockstar" | DaBaby featuring Roddy Ricch |
| 17 July | "Savage Love (Laxed – Siren Beat)" | Jawsh 685 and Jason Derulo |
| 24 July | "Head & Heart" | Joel Corry and MNEK |
| 31 July | "Head & Heart" | Joel Corry and MNEK |
| 7 August | "Head & Heart" | Joel Corry and MNEK |
| 14 August | "Head & Heart" | Joel Corry and MNEK |
| 21 August | "Head & Heart" | Joel Corry and MNEK |
| 28 August | "WAP" | Cardi B featuring Megan Thee Stallion |
| 4 September | "WAP" | Cardi B featuring Megan Thee Stallion |
| 11 September | "WAP" | Cardi B featuring Megan Thee Stallion |
| 18 September | "Mood" | 24kGoldn featuring Iann Dior |
| 25 September | "Mood" | 24kGoldn featuring Iann Dior |
| 2 October | "Mood" | 24kGoldn featuring Iann Dior |
| 9 October | "Mood" | 24kGoldn featuring Iann Dior |
| 16 October | "Looking for Me" | Paul Woolford and Diplo featuring Kareen Lomax |
| 23 October | "Looking for Me" | Paul Woolford and Diplo featuring Kareen Lomax |
| 30 October | "Positions" | Ariana Grande |
| 6 November | "Positions" | Ariana Grande |
| 13 November | "Positions" | Ariana Grande |
| 20 November | "Therefore I Am" | Billie Eilish |
| 27 November | "Paradise" | Meduza featuring Dermot Kennedy |
| 4 December | "Giants" | Dermot Kennedy |
| 11 December | "Giants" | Dermot Kennedy |
| 18 December | "Giants" | Dermot Kennedy |
| 25 December | "Giants" | Dermot Kennedy |

## Number-one artists

| Position | Artist | Weeks at No. 1 |
| 1 | Saint Jhn | 8 |
| 1 | DaBaby | 8 |
| 1 | Roddy Ricch | 8 |
| 4 | Joel Corry | 5 |
| 4 | MNEK | 5 |
| 4 | Dermot Kennedy | 5 |
| 7 | The Weeknd | 4 |
| 7 | 24kGoldn | 4 |
| 7 | Iann Dior | 4 |
| 7 | Ariana Grande | 4 |
| 11 | Lewis Capaldi | 3 |
| 11 | Cardi B | 3 |
| 11 | Megan Thee Stallion | 3 |
| 14 | Drake | 2 |
| 14 | Paul Woolford | 2 |
| 14 | Diplo | 2 |
| 14 | Kareen Lomax | 2 |
| 14 | Billie Eilish | 2 |
| 19 | Eminem | 1 |
| 19 | Juice Wrld | 1 |
| 19 | Lady Gaga | 1 |
| 19 | Jawsh 685 | 1 |
| 19 | Jason Derulo | 1 |
| 19 | Meduza | 1 |