# List of Ultratop 50 number-one singles of 2020

These hits topped the Ultratop 50 in 2020.
Flanders :
| Issue date | Song | Artist |
| 4 January | "Dance Monkey" | Tones and I |
| 11 January | "Dance Monkey" | Tones and I |
| 18 January | "Dance Monkey" | Tones and I |
| 25 January | "Blinding Lights" | The Weeknd |
| 1 February | "Blinding Lights" | The Weeknd |
| 8 February | "Blinding Lights" | The Weeknd |
| 15 February | "Blinding Lights" | The Weeknd |
| 22 February | "Blinding Lights" | The Weeknd |
| 29 February | "Blinding Lights" | The Weeknd |
| 7 March | "Blinding Lights" | The Weeknd |
| 14 March | "Blinding Lights" | The Weeknd |
| 21 March | "Blinding Lights" | The Weeknd |
| 28 March | "Blinding Lights" | The Weeknd |
| 4 April | "Blinding Lights" | The Weeknd |
| 11 April | "Blinding Lights" | The Weeknd |
| 18 April | "Blinding Lights" | The Weeknd |
| 25 April | "Blinding Lights" | The Weeknd |
| 2 May | "Kom wat dichterbij" | Regi featuring Jake Reese and OT |
| 9 May | "Kom wat dichterbij" | Regi featuring Jake Reese and OT |
| 16 May | "Blinding Lights" | The Weeknd |
| 23 May | "Kom wat dichterbij" | Regi Penxten featuring Jake Reese and OT |
| 30 May | "Blinding Lights" | The Weeknd |
| 6 June | "Blinding Lights" | The Weeknd |
| 13 June | "Kom wat dichterbij" | Regi Penxten featuring Jake Reese and OT |
| 20 June | "Kom wat dichterbij" | Regi Penxten featuring Jake Reese and OT |
| 27 June | "Kom wat dichterbij" | Regi Penxten featuring Jake Reese and OT |
| 4 July | "Kom wat dichterbij" | Regi Penxten featuring Jake Reese and OT |
| 11 July | "Kom wat dichterbij" | Regi Penxten featuring Jake Reese and OT |
| 18 July | "Kom wat dichterbij" | Regi Penxten featuring Jake Reese and OT |
| 25 July | "Savage Love (Laxed – Siren Beat)" | Jawsh 685 and Jason Derulo |
| 1 August | "Savage Love (Laxed – Siren Beat)" | Jawsh 685 and Jason Derulo |
| 8 August | "Savage Love (Laxed – Siren Beat)" | Jawsh 685 and Jason Derulo |
| 15 August | "Savage Love (Laxed – Siren Beat)" | Jawsh 685 and Jason Derulo |
| 22 August | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 29 August | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 5 September | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 12 September | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 19 September | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 26 September | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 3 October | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 10 October | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 17 October | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 24 October | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 31 October | "Head & Heart" | Joel Corry featuring MNEK |
| 7 November | "Head & Heart" | Joel Corry featuring MNEK |
| 14 November | "Fever" | Dua Lipa and Angèle |
| 21 November | "Fever" | Dua Lipa and Angèle |
| 28 November | "Head & Heart" | Joel Corry featuring MNEK |
| 5 December | "Fever" | Dua Lipa and Angèle |
| 12 December | "Fever" | Dua Lipa and Angèle |
| 19 December | "Fever" | Dua Lipa and Angèle |
| 26 December | "Fever" | Dua Lipa and Angèle |
Wallonia :
| Issue date | Song | Artist |
| 4 January | "Dance Monkey" | Tones and I |
| 11 January | "Dance Monkey" | Tones and I |
| 18 January | "Dance Monkey" | Tones and I |
| 25 January | "Dance Monkey" | Tones and I |
| 1 February | "Blinding Lights" | The Weeknd |
| 8 February | "Blinding Lights" | The Weeknd |
| 15 February | "Blinding Lights" | The Weeknd |
| 22 February | "Blinding Lights" | The Weeknd |
| 29 February | "Blinding Lights" | The Weeknd |
| 7 March | "Blinding Lights" | The Weeknd |
| 14 March | "Blinding Lights" | The Weeknd |
| 21 March | "Lettre à une femme" | Ninho |
| 28 March | "Blinding Lights" | The Weeknd |
| 4 April | "Blinding Lights" | The Weeknd |
| 11 April | "Blinding Lights" | The Weeknd |
| 18 April | "Blinding Lights" | The Weeknd |
| 25 April | "Blinding Lights" | The Weeknd |
| 2 May | "Roses (Imanbek Remix)" | Saint Jhn |
| 9 May | "Roses (Imanbek Remix)" | Saint Jhn |
| 16 May | "Roses (Imanbek Remix)" | Saint Jhn |
| 23 May | "Some Say" | Nea |
| 30 May | "Some Say" | Nea |
| 6 June | "Breaking Me" | Topic featuring A7S |
| 13 June | "Breaking Me" | Topic featuring A7S |
| 20 June | "Djomb" | Bosh |
| 27 June | "Djomb" | Bosh |
| 4 July | "Djomb" | Bosh |
| 11 July | "In Your Eyes" | The Weeknd |
| 18 July | "In Your Eyes" | The Weeknd |
| 25 July | "In Your Eyes" | The Weeknd |
| 1 August | "In Your Eyes" | The Weeknd |
| 8 August | "In Your Eyes" | The Weeknd |
| 15 August | "Mamacita" | Black Eyed Peas, Ozuna and J Rey Soul |
| 22 August | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 29 August | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 5 September | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 12 September | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 19 September | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 26 September | "BXL Zoo" | Damso featuring Hamza |
| 3 October | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 10 October | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 17 October | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 24 October | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 31 October | "Jerusalema (Remix)" | Master KG featuring Burna Boy and Nomcebo Zikode |
| 7 November | "Fever" | Dua Lipa and Angèle |
| 14 November | "Fever" | Dua Lipa and Angèle |
| 21 November | "Fever" | Dua Lipa and Angèle |
| 28 November | "Fever" | Dua Lipa and Angèle |
| 5 December | "Fever" | Dua Lipa and Angèle |
| 12 December | "Fever" | Dua Lipa and Angèle |
| 19 December | "Fever" | Dua Lipa and Angèle |
| 26 December | "Fever" | Dua Lipa and Angèle |
Flanders Ranking of most weeks at number 1 :
| Position | Artist | Weeks #1 |
Wallonia Ranking of most weeks at number 1 :
| Position | Artist | Weeks #1 |