These are the Billboard magazine Hot Dance Music/Club Play number one hits of 1975.
NOTE: Billboard has adopted former publication rival Record World's chart statistics from the weeks between March 29 1975 and August 21 1976 into their Hot Dance Music/Club Play chart history as Billboard did not publish a national chart during this time (Billboard published multiple charts featuring regional- or city-specific hits during this era).
| Issue Date | Song | Artist |
| January 4 | I'll Be Holding On | Al Downing |
| January 11 | I'll Be Holding On | Al Downing |
| January 18 | Shame, Shame, Shame | Shirley & Company |
| January 25 | Shame, Shame, Shame | Shirley & Company |
| February 1 | Shame, Shame, Shame | Shirley & Company |
| February 8 | Shame, Shame, Shame | Shirley & Company |
| February 15 | Hijack | Herbie Mann |
| February 22 | Hijack | Herbie Mann |
| March 1 | Hijack | Herbie Mann |
| March 8 | Bad Luck | Harold Melvin & the Blue Notes |
| March 15 | Bad Luck | Harold Melvin & the Blue Notes |
| March 22 | Bad Luck | Harold Melvin & the Blue Notes |
| March 29 | Bad Luck | Harold Melvin & the Blue Notes |
| April 5 | Bad Luck | Harold Melvin & the Blue Notes |
| April 12 | Bad Luck | Harold Melvin & the Blue Notes |
| April 19 | Bad Luck | Harold Melvin & the Blue Notes |
| April 26 | Bad Luck | Harold Melvin & the Blue Notes |
| May 3 | Bad Luck | Harold Melvin & the Blue Notes |
| May 10 | Bad Luck | Harold Melvin & the Blue Notes |
| May 17 | Bad Luck | Harold Melvin & the Blue Notes |
| May 24 | Ease On Down the Road | Consumer Rapport |
| May 31 | Ease On Down the Road | Consumer Rapport |
| June 7 | Ease On Down the Road | Consumer Rapport |
| June 14 | Ease On Down the Road | Consumer Rapport |
| June 21 | Free Man | South Shore Commission |
| June 28 | Ease On Down the Road | Consumer Report |
| July 5 | Forever Came Today | The Jackson 5 |
| July 12 | Forever Came Today | The Jackson 5 |
| July 19 | Forever Came Today | The Jackson 5 |
| July 26 | Dreaming A Dream | Crown Heights Affair |
| August 2 | Forever Came Today | The Jackson 5 |
| August 9 | Brazil | The Ritchie Family |
| August 16 | Brazil | The Ritchie Family |
| August 23 | Brazil | The Ritchie Family |
| August 30 | Brazil | The Ritchie Family |
| September 6 | Brazil | The Ritchie Family |
| September 13 | Brazil | The Ritchie Family |
| September 20 | Brazil | The Ritchie Family |
| September 27 | Fly, Robin, Fly | Silver Convention |
| October 4 | Fly, Robin, Fly | Silver Convention |
| October 11 | Fly, Robin, Fly | Silver Convention |
| October 18 | Casanova Brown / (If You Want It) Do It Yourself / How High the Moon | Gloria Gaynor |
| October 25 | Love To Love You Baby | Donna Summer |
| November 1 | Love To Love You Baby | Donna Summer |
| November 8 | Love To Love You Baby | Donna Summer |
| November 15 | Love To Love You Baby | Donna Summer |
| November 22 | I Love Music | The O'Jays |
| November 29 | I Love Music | The O'Jays |
| December 6 | I Love Music | The O'Jays |
| December 13 | I Love Music | The O'Jays |
| December 20 | I Love Music | The O'Jays |
| December 27 | I Love Music | The O'Jays |