Hot 100 number-one hits of 1971 (United States)
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These are the Billboard magazine Hot 100 number one hits of 1971.
| Issue Date | Song | Artist |
| January 2 | "My Sweet Lord" / "Isn't It a Pity" | George Harrison |
| January 9 | "My Sweet Lord" / "Isn't It a Pity" | George Harrison |
| January 16 | "My Sweet Lord" / "Isn't It a Pity" | George Harrison |
| January 23 | "Knock Three Times" | Dawn |
| January 30 | "Knock Three Times" | Dawn |
| February 6 | "Knock Three Times" | Dawn |
| February 13 | "One Bad Apple" | The Osmonds |
| February 20 | "One Bad Apple" | The Osmonds |
| February 27 | "One Bad Apple" | The Osmonds |
| March 6 | "One Bad Apple" | The Osmonds |
| March 13 | "One Bad Apple" | The Osmonds |
| March 20 | "Me and Bobby McGee" | Janis Joplin |
| March 27 | "Me and Bobby McGee" | Janis Joplin |
| April 3 | "Just My Imagination (Running Away with Me)" | The Temptations |
| April 10 | "Just My Imagination (Running Away with Me)" | The Temptations |
| April 17 | "Joy to the World" | Three Dog Night |
| April 24 | "Joy to the World" | Three Dog Night |
| May 1 | "Joy to the World" | Three Dog Night |
| May 8 | "Joy to the World" | Three Dog Night |
| May 15 | "Joy to the World" | Three Dog Night |
| May 22 | "Joy to the World" | Three Dog Night |
| May 29 | "Brown Sugar" | The Rolling Stones |
| June 5 | "Brown Sugar" | The Rolling Stones |
| June 12 | "Want Ads" | The Honey Cone |
| June 19 | "It's Too Late" / "I Feel the Earth Move" | Carole King |
| June 26 | "It's Too Late" / "I Feel the Earth Move" | Carole King |
| July 3 | "It's Too Late" / "I Feel the Earth Move" | Carole King |
| July 10 | "It's Too Late" / "I Feel the Earth Move" | Carole King |
| July 17 | "It's Too Late" / "I Feel the Earth Move" | Carole King |
| July 24 | "Indian Reservation (The Lament of the Cherokee Reservation Indian)" | The Raiders |
| July 31 | "You've Got a Friend" | James Taylor |
| August 7 | "How Can You Mend a Broken Heart?" | Bee Gees |
| August 14 | "How Can You Mend a Broken Heart?" | Bee Gees |
| August 21 | "How Can You Mend a Broken Heart?" | Bee Gees |
| August 28 | "How Can You Mend a Broken Heart?" | Bee Gees |
| September 4 | "Uncle Albert/Admiral Halsey" | Paul McCartney and Linda McCartney |
| September 11 | "Go Away Little Girl" | Donny Osmond |
| September 18 | "Go Away Little Girl" | Donny Osmond |
| September 25 | "Go Away Little Girl" | Donny Osmond |
| October 2 | "Maggie May" / "Reason to Believe" | Rod Stewart |
| October 9 | "Maggie May" / "Reason to Believe" | Rod Stewart |
| October 16 | "Maggie May" / "Reason to Believe" | Rod Stewart |
| October 23 | "Maggie May" / "Reason to Believe" | Rod Stewart |
| October 30 | "Maggie May" / "Reason to Believe" | Rod Stewart |
| November 6 | "Gypsys, Tramps & Thieves" | Cher |
| November 13 | "Gypsys, Tramps & Thieves" | Cher |
| November 20 | "Theme from Shaft" | Isaac Hayes |
| November 27 | "Theme from Shaft" | Isaac Hayes |
| December 4 | "Family Affair" | Sly & the Family Stone |
| December 11 | "Family Affair" | Sly & the Family Stone |
| December 18 | "Family Affair" | Sly & the Family Stone |
| December 25 | "Brand New Key" | Melanie |
