| Flanders | | Issue date | Song | Artist |
|---|
| 7 January | "24K Magic" | Bruno Mars |
| 14 January | "Hey Baby" | Dimitri Vegas & Like Mike vs. Diplo featuring Deb's Daughter |
| 21 January | "Shape of You" | Ed Sheeran |
| 28 January |
| 4 February |
| 11 February |
| 18 February |
| 25 February |
| 4 March |
| 11 March |
| 18 March |
| 25 March |
| 1 April |
| 8 April |
| 15 April |
| 22 April |
| 29 April | "Something Just Like This" | The Chainsmokers featuring Coldplay |
| 6 May | "Shape of You" | Ed Sheeran |
| 13 May | "Something Just Like This" | The Chainsmokers featuring Coldplay |
| 20 May | "City Lights" | Blanche |
| 27 May |
| 3 June | "Despacito" | Luis Fonsi featuring Daddy Yankee |
| 10 June |
| 17 June |
| 24 June |
| 1 July |
| 8 July |
| 15 July |
| 22 July |
| 29 July |
| 5 August |
| 12 August |
| 19 August |
| 26 August | "Where Did You Go (Summer Love)" | Regi |
| 2 September |
| 9 September |
| 16 September |
| 23 September | "New Rules" | Dua Lipa |
| 30 September |
| 7 October | "Perfect" | Ed Sheeran |
| 14 October | "New Rules" | Dua Lipa |
| 21 October |
| 28 October |
| 4 November | "Perfect"
(including "Perfect Duet" and "Perfect Symphony") | Ed Sheeran
(with Beyoncé / with Andrea Bocelli) |
| 11 November |
| 18 November |
| 25 November |
| 2 December |
| 9 December |
| 16 December |
| 23 December |
| 30 December |
{{col-2}}1. ^The year's Archives on "Ultratop.be"
{{Ultratop 50}}