# List of Ultratop 50 number-one singles of 2011

These hits topped the Belgian Ultratop 50 in 2011.
Flemish chart :
| Issue Date | Song | Artist |
| 1 January | "Hello" | Martin Solveig & Dragonette |
| 8 January | "Hello" | Martin Solveig & Dragonette |
| 15 January | "Hello" | Martin Solveig & Dragonette |
| 22 January | "Discotex! (Yah!)" | DJ F.R.A.N.K. |
| 29 January | "Rolling in the Deep" | Adele |
| 5 February | "Rolling in the Deep" | Adele |
| 12 February | "Rolling in the Deep" | Adele |
| 19 February | "Rolling in the Deep" | Adele |
| 26 February | "Born This Way" | Lady Gaga |
| 5 March | "On the Floor" | Jennifer Lopez featuring Pitbull |
| 12 March | "On the Floor" | Jennifer Lopez featuring Pitbull |
| 19 March | "On the Floor" | Jennifer Lopez featuring Pitbull |
| 26 March | "On the Floor" | Jennifer Lopez featuring Pitbull |
| 2 April | "More to Me" | Idool 2011 Finalisten |
| 9 April | "More to Me" | Idool 2011 Finalisten |
| 16 April | "More to Me" | Idool 2011 Finalisten |
| 23 April | "More to Me" | Idool 2011 Finalisten |
| 30 April | "More to Me" | Idool 2011 Finalisten |
| 7 May | "Price Tag" | Jessie J featuring B.o.B |
| 14 May | "Party Rock Anthem" | LMFAO featuring Lauren Bennett & GoonRock |
| 21 May | "Set Fire to the Rain" | Adele |
| 28 May | "Set Fire to the Rain" | Adele |
| 4 June | "She's Got Moves" | Kevin |
| 11 June | "She's Got Moves" | Kevin |
| 18 June | "Give Me Everything" | Pitbull featuring Ne-Yo, Afrojack & Nayer |
| 25 June | "Give Me Everything" | Pitbull featuring Ne-Yo, Afrojack & Nayer |
| 2 July | "Give Me Everything" | Pitbull featuring Ne-Yo, Afrojack & Nayer |
| 9 July | "Give Me Everything" | Pitbull featuring Ne-Yo, Afrojack & Nayer |
| 16 July | "Give Me Everything" | Pitbull featuring Ne-Yo, Afrojack & Nayer |
| 23 July | "Loca People" | Sak Noel |
| 30 July | "Loca People" | Sak Noel |
| 6 August | "Loca People" | Sak Noel |
| 13 August | "Loca People" | Sak Noel |
| 20 August | "Il nous faut" | Elisa Tovati & Tom Dice |
| 27 August | "Somebody That I Used to Know" | Gotye featuring Kimbra |
| 3 September | "Somebody That I Used to Know" | Gotye featuring Kimbra |
| 10 September | "Somebody That I Used to Know" | Gotye featuring Kimbra |
| 17 September | "Somebody That I Used to Know" | Gotye featuring Kimbra |
| 24 September | "Somebody That I Used to Know" | Gotye featuring Kimbra |
| 1 October | "Somebody That I Used to Know" | Gotye featuring Kimbra |
| 8 October | "Somebody That I Used to Know" | Gotye featuring Kimbra |
| 15 October | "Somebody That I Used to Know" | Gotye featuring Kimbra |
| 22 October | "Somebody That I Used to Know" | Gotye featuring Kimbra |
| 29 October | "Somebody That I Used to Know" | Gotye featuring Kimbra |
| 5 November | "Somebody That I Used to Know" | Gotye featuring Kimbra |
| 12 November | "Somebody That I Used to Know" | Gotye featuring Kimbra |
| 19 November | "I Follow Rivers" | Lykke Li |
| 26 November | "I Follow Rivers" | Lykke Li |
| 3 December | "I Follow Rivers" | Lykke Li |
| 10 December | "Zanna" | Selah Sue & Tom Barman vs. The Subs |
| 17 December | "Zanna" | Selah Sue & Tom Barman vs. The Subs |
| 24 December | "Zanna" | Selah Sue & Tom Barman vs. The Subs |
| 31 December | "Zanna" | Selah Sue & Tom Barman vs. The Subs |
Francophone chart :
| Issue Date | Song | Artist |
| 1 January | "The Time (Dirty Bit)" | The Black Eyed Peas |
| 8 January | "The Time (Dirty Bit)" | The Black Eyed Peas |
| 15 January | "Who's That Chick?" | David Guetta featuring Rihanna |
| 22 January | "Hold It Against Me" | Britney Spears |
| 29 January | "Rolling in the Deep" | Adele |
| 5 February | "Over the Rainbow" | Israel Kamakawiwo'ole |
| 12 February | "Over the Rainbow" | Israel Kamakawiwo'ole |
| 19 February | "Over the Rainbow" | Israel Kamakawiwo'ole |
| 26 February | "Over the Rainbow" | Israel Kamakawiwo'ole |
| 5 March | "Over the Rainbow" | Israel Kamakawiwo'ole |
| 12 March | "On the Floor" | Jennifer Lopez featuring Pitbull |
| 19 March | "On the Floor" | Jennifer Lopez featuring Pitbull |
| 26 March | "On the Floor" | Jennifer Lopez featuring Pitbull |
| 2 April | "Sweat" | Snoop Dogg vs. David Guetta |
| 9 April | "On the Floor" | Jennifer Lopez featuring Pitbull |
| 16 April | "Sweat" | Snoop Dogg vs. David Guetta |
| 23 April | "Sweat" | Snoop Dogg vs. David Guetta |
| 30 April | "Sweat" | Snoop Dogg vs. David Guetta |
| 7 May | "Price Tag" | Jessie J featuring B.o.B |
| 14 May | "Price Tag" | Jessie J featuring B.o.B |
| 21 May | "Price Tag" | Jessie J featuring B.o.B |
| 28 May | "Sweat" | Snoop Dogg vs. David Guetta |
| 4 June | "L'horloge tourne" | Mickaël Miro |
| 11 June | "L'horloge tourne" | Mickaël Miro |
| 18 June | "Give Me Everything" | Pitbull featuring Ne-Yo, Afrojack & Nayer |
| 25 June | "Give Me Everything" | Pitbull featuring Ne-Yo, Afrojack & Nayer |
| 2 July | "L'horloge tourne" | Mickaël Miro |
| 9 July | "Give Me Everything" | Pitbull featuring Ne-Yo, Afrojack & Nayer |
| 16 July | "Give Me Everything" | Pitbull featuring Ne-Yo, Afrojack & Nayer |
| 23 July | "Give Me Everything" | Pitbull featuring Ne-Yo, Afrojack & Nayer |
| 30 July | "Set Fire to the Rain" | Adele |
| 6 August | "Set Fire to the Rain" | Adele |
| 13 August | "Set Fire to the Rain" | Adele |
| 20 August | "Il nous faut" | Elisa Tovati & Tom Dice |
| 27 August | "Il nous faut" | Elisa Tovati & Tom Dice |
| 3 September | "Elle me dit" | Mika |
| 10 September | "Elle me dit" | Mika |
| 17 September | "Elle me dit" | Mika |
| 24 September | "Elle me dit" | Mika |
| 1 October | "Elle me dit" | Mika |
| 8 October | "Elle me dit" | Mika |
| 15 October | "Someone Like You" | Adele |
| 22 October | "I Follow Rivers" | Lykke Li |
| 29 October | "I Follow Rivers" | Lykke Li |
| 5 November | "I Follow Rivers" | Lykke Li |
| 12 November | "I Follow Rivers" | Lykke Li |
| 19 November | "I Follow Rivers" | Lykke Li |
| 26 November | "I Follow Rivers" | Lykke Li |
| 3 December | "I Follow Rivers" | Lykke Li |
| 10 December | "I Follow Rivers" | Lykke Li |
| 17 December | "I Follow Rivers" | Lykke Li |
| 24 December | "Je l'aime à mourir" | Shakira |
| 31 December | "Je l'aime à mourir" | Shakira |