# List of Ultratop 50 number-one singles of 2019

These hits topped the Ultratop 50 in 2019.
Flanders :
| Issue date | Song | Artist |
| 5 January | "Sweet but Psycho" | Ava Max |
| 12 January | "Sweet but Psycho" | Ava Max |
| 19 January | "Sweet but Psycho" | Ava Max |
| 26 January | "Sweet but Psycho" | Ava Max |
| 2 February | "Sweet but Psycho" | Ava Max |
| 9 February | "Sweet but Psycho" | Ava Max |
| 16 February | "Sweet but Psycho" | Ava Max |
| 23 February | "Sweet but Psycho" | Ava Max |
| 2 March | "Sweet but Psycho" | Ava Max |
| 9 March | "Sweet but Psycho" | Ava Max |
| 16 March | "Giant" | Calvin Harris and Rag'n'Bone Man |
| 23 March | "Giant" | Calvin Harris and Rag'n'Bone Man |
| 30 March | "Giant" | Calvin Harris and Rag'n'Bone Man |
| 6 April | "Giant" | Calvin Harris and Rag'n'Bone Man |
| 13 April | "Giant" | Calvin Harris and Rag'n'Bone Man |
| 20 April | "Giant" | Calvin Harris and Rag'n'Bone Man |
| 27 April | "Giant" | Calvin Harris and Rag'n'Bone Man |
| 4 May | "Old Town Road" | Lil Nas X |
| 11 May | "Old Town Road" | Lil Nas X |
| 18 May | "Old Town Road" | Lil Nas X |
| 25 May | "Old Town Road" | Lil Nas X |
| 1 June | "Old Town Road" | Lil Nas X |
| 8 June | "Old Town Road" | Lil Nas X |
| 15 June | "Old Town Road" | Lil Nas X |
| 4 May | "Old Town Road" | Lil Nas X ft. Billy Ray Cyrus |
| 29 June | "Old Town Road" | Lil Nas X ft. Billy Ray Cyrus |
| 6 July | "Old Town Road" | Lil Nas X ft. Billy Ray Cyrus |
| 13 July | "Old Town Road" | Lil Nas X ft. Billy Ray Cyrus |
| 20 July | "Hoe het danst" | Marco Borsato, Armin van Buuren and Davina Michelle |
| 27 July | "Hoe het danst" | Marco Borsato, Armin van Buuren and Davina Michelle |
| 3 August | "Hoe het danst" | Marco Borsato, Armin van Buuren and Davina Michelle |
| 10 August | "Hoe het danst" | Marco Borsato, Armin van Buuren and Davina Michelle |
| 17 August | "Hoe het danst" | Marco Borsato, Armin van Buuren and Davina Michelle |
| 24 August | "Hoe het danst" | Marco Borsato, Armin van Buuren and Davina Michelle |
| 31 August | "Hoe het danst" | Marco Borsato, Armin van Buuren and Davina Michelle |
| 7 September | "Hoe het danst" | Marco Borsato, Armin van Buuren and Davina Michelle |
| 14 September | "Hoe het danst" | Marco Borsato, Armin van Buuren and Davina Michelle |
| 21 September | "Hoe het danst" | Marco Borsato, Armin van Buuren and Davina Michelle |
| 28 September | "Dance Monkey" | Tones and I |
| 5 October | "Dance Monkey" | Tones and I |
| 12 October | "Dance Monkey" | Tones and I |
| 19 October | "Dance Monkey" | Tones and I |
| 26 October | "Dance Monkey" | Tones and I |
| 2 November | "Dance Monkey" | Tones and I |
| 9 November | "Dance Monkey" | Tones and I |
| 16 November | "Dance Monkey" | Tones and I |
| 23 November | "Dance Monkey" | Tones and I |
| 30 November | "Dance Monkey" | Tones and I |
| 7 December | "Dance Monkey" | Tones and I |
| 14 December | "Dance Monkey" | Tones and I |
| 21 December | "Dance Monkey" | Tones and I |
| 28 December | "Dance Monkey" | Tones and I |
Wallonia :
| Issue date | Song | Artist |
| 5 January | "Tout oublier" | Angèle featuring Roméo Elvis |
| 12 January | "Tout oublier" | Angèle featuring Roméo Elvis |
| 19 January | "Tout oublier" | Angèle featuring Roméo Elvis |
| 26 January | "Tout oublier" | Angèle featuring Roméo Elvis |
| 2 February | "Tout oublier" | Angèle featuring Roméo Elvis |
| 9 February | "Tout oublier" | Angèle featuring Roméo Elvis |
| 16 February | "Tout oublier" | Angèle featuring Roméo Elvis |
| 23 February | "Tout oublier" | Angèle featuring Roméo Elvis |
| 2 March | "Tout oublier" | Angèle featuring Roméo Elvis |
| 9 March | "Tout oublier" | Angèle featuring Roméo Elvis |
| 16 March | "Sweet but Psycho" | Ava Max |
| 23 March | "Giant" | Calvin Harris and Rag'n'Bone Man |
| 30 March | "Au DD" | PNL |
| 6 April | "Au DD" | PNL |
| 13 April | "Au DD" | PNL |
| 20 April | "Au DD" | PNL |
| 27 April | "Balance ton quoi" | Angèle |
| 4 May | "Balance ton quoi" | Angèle |
| 11 May | "Balance ton quoi" | Angèle |
| 18 May | "Balance ton quoi" | Angèle |
| 25 May | "Balance ton quoi" | Angèle |
| 1 June | "Balance ton quoi" | Angèle |
| 8 June | "Balance ton quoi" | Angèle |
| 15 June | "Tricheur" | Nekfeu featuring Damso |
| 22 June | "Old Town Road" | Lil Nas X |
| 29 June | "Old Town Road" | Lil Nas X |
| 6 July | "Old Town Road" | Lil Nas X |
| 13 July | "Old Town Road" | Lil Nas X ft. Billy Ray Cyrus |
| 20 July | "Old Town Road" | Lil Nas X ft. Billy Ray Cyrus |
| 27 July | "Old Town Road" | Lil Nas X ft. Billy Ray Cyrus |
| 3 August | "Old Town Road" | Lil Nas X ft. Billy Ray Cyrus |
| 10 August | "Old Town Road" | Lil Nas X ft. Billy Ray Cyrus |
| 17 August | "Old Town Road" | Lil Nas X ft. Billy Ray Cyrus |
| 24 August | "Old Town Road" | Lil Nas X ft. Billy Ray Cyrus |
| 31 August | "Old Town Road" | Lil Nas X ft. Billy Ray Cyrus |
| 7 September | "Old Town Road" | Lil Nas X ft. Billy Ray Cyrus |
| 14 September | "Señorita" | Shawn Mendes and Camila Cabello |
| 21 September | "Señorita" | Shawn Mendes and Camila Cabello |
| 28 September | "Señorita" | Shawn Mendes and Camila Cabello |
| 5 October | "Dance Monkey" | Tones and I |
| 12 October | "Dance Monkey" | Tones and I |
| 19 October | "Dance Monkey" | Tones and I |
| 26 October | "Dance Monkey" | Tones and I |
| 2 November | "Dance Monkey" | Tones and I |
| 9 November | "Dance Monkey" | Tones and I |
| 16 November | "Dance Monkey" | Tones and I |
| 23 November | "Dance Monkey" | Tones and I |
| 30 November | "Dance Monkey" | Tones and I |
| 7 December | "Dance Monkey" | Tones and I |
| 14 December | "Dance Monkey" | Tones and I |
| 21 December | "Dance Monkey" | Tones and I |
| 28 December | "Dance Monkey" | Tones and I |
Flanders Ranking of most weeks at number 1 :
| Position | Artist | Weeks #1 |
Wallonia Ranking of most weeks at number 1 :
| Position | Artist | Weeks #1 |