List of Ultratop 50 number-one singles of 2005
# List of Ultratop 50 number-one singles of 2005

These hits topped the Ultratop 50 charts in 2005 (see 2005 in music).

| Issue Date | Artist | Song |
| - | - | - |
| January 1 | Joeri Fransen | "Ya 'bout to find out" |
| January 8 | Joeri Fransen | "Ya 'bout to find out" |
| January 15 | Joeri Fransen | "Ya 'bout to find out" |
| January 22 | Artiesten Voor Tsunami 12-12 | "Geef een teken" ("Give Me a Sign") |
| January 29 | Artiesten Voor Tsunami 12-12 | "Geef een teken" ("Give Me a Sign") |
| February 5 | Artiesten Voor Tsunami 12-12 | "Geef een teken" ("Give Me a Sign") |
| February 12 | Artiesten Voor Tsunami 12-12 | "Geef een teken" ("Give Me a Sign") |
| February 19 | Artiesten Voor Tsunami 12-12 | "Geef een teken" ("Give Me a Sign") |
| February 26 | Schnappi | "Das kleine Krokodil" |
| March 5 | Schnappi | "Das kleine Krokodil" |
| March 12 | Schnappi | "Das kleine Krokodil" |
| March 19 | Schnappi | "Das kleine Krokodil" |
| March 26 | Schnappi | "Das kleine Krokodil" |
| April 2 | Schnappi | "Das kleine Krokodil" |
| April 9 | Schnappi | "Das kleine Krokodil" |
| April 16 | Schnappi | "Das kleine Krokodil" |
| April 23 | 50 Cent & Olivia | "Candy Shop" |
| April 30 | 50 Cent & Olivia | "Candy Shop" |
| May 7 | Star Academy | "Fame" |
| May 14 | Star Academy | "Fame" |
| May 21 | Star Academy | "Fame" |
| May 28 | Star Academy | "Fame" |
| June 4 | Crazy Frog | "Axel F" |
| June 11 | Crazy Frog | "Axel F" |
| June 18 | Crazy Frog | "Axel F" |
| June 25 | Crazy Frog | "Axel F" |
| July 2 | Crazy Frog | "Axel F" |
| July 9 | Crazy Frog | "Axel F" |
| July 16 | Crazy Frog | "Axel F" |
| July 23 | Crazy Frog | "Axel F" |
| July 30 | Crazy Frog | "Axel F" |
| August 6 | Crazy Frog | "Axel F" |
| August 13 | Crazy Frog | "Axel F" |
| August 20 | Crazy Frog | "Axel F" |
| August 27 | James Blunt | "You're Beautiful" |
| September 3 | James Blunt | "You're Beautiful" |
| September 10 | James Blunt | "You're Beautiful" |
| September 17 | James Blunt | "You're Beautiful" |
| September 24 | James Blunt | "You're Beautiful" |
| October 1 | The Pussycat Dolls featuring Busta Rhymes | "Don't Cha" |
| October 8 | The Pussycat Dolls featuring Busta Rhymes | "Don't Cha" |
| October 15 | Bob Sinclar | "Love Generation" |
| October 22 | Bob Sinclar | "Love Generation" |
| October 29 | Bob Sinclar | "Love Generation" |
| November 5 | Bob Sinclar | "Love Generation" |
| November 12 | Bob Sinclar | "Love Generation" |
| November 19 | Bob Sinclar | "Love Generation" |
| November 26 | Madonna | "Hung Up" |
| December 3 | Madonna | "Hung Up" |
| December 10 | Madonna | "Hung Up" |
| December 17 | Bob Sinclar | "Love Generation" |
| December 24 | Bob Sinclar | "Love Generation" |
| December 31 | Kippensoep Allstars | "Kippensoep voor iedereen" |
