Number-one albums of 1981 (U.S.)
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These are the Billboard Magazine number one albums of 1981, per the Billboard 200.
| Issue Date | Album | Artist |
| January 3 | Double Fantasy | John Lennon |
| January 10 | Double Fantasy | John Lennon |
| January 17 | Double Fantasy | John Lennon |
| January 24 | Double Fantasy | John Lennon |
| January 31 | Double Fantasy | John Lennon |
| February 7 | Double Fantasy | John Lennon |
| February 14 | Double Fantasy | John Lennon |
| February 21 | Hi Infidelity | REO Speedwagon |
| February 28 | Hi Infidelity | REO Speedwagon |
| March 7 | Hi Infidelity | REO Speedwagon |
| March 14 | Hi Infidelity | REO Speedwagon |
| March 21 | Hi Infidelity | REO Speedwagon |
| March 28 | Hi Infidelity | REO Speedwagon |
| April 4 | Paradise Theater | Styx |
| April 11 | Paradise Theater | Styx |
| April 18 | Hi Infidelity | REO Speedwagon |
| April 25 | Hi Infidelity | REO Speedwagon |
| May 2 | Hi Infidelity | REO Speedwagon |
| May 9 | Paradise Theater | Styx |
| May 16 | Hi Infidelity | REO Speedwagon |
| May 23 | Hi Infidelity | REO Speedwagon |
| May 30 | Hi Infidelity | REO Speedwagon |
| June 6 | Hi Infidelity | REO Speedwagon |
| June 13 | Hi Infidelity | REO Speedwagon |
| June 20 | Hi Infidelity | REO Speedwagon |
| June 27 | Mistaken Identity | Kim Carnes |
| July 4 | Mistaken Identity | Kim Carnes |
| July 11 | Mistaken Identity | Kim Carnes |
| July 18 | Mistaken Identity | Kim Carnes |
| July 25 | Long Distance Voyager | The Moody Blues |
| August 1 | Long Distance Voyager | The Moody Blues |
| August 8 | Long Distance Voyager | The Moody Blues |
| August 15 | Precious Time | Pat Benatar |
| August 22 | 4 | Foreigner |
| August 29 | 4 | Foreigner |
| September 5 | Bella Donna | Stevie Nicks |
| September 12 | Escape | Journey |
| September 19 | Tattoo You | Rolling Stones |
| September 26 | Tattoo You | Rolling Stones |
| October 3 | Tattoo You | Rolling Stones |
| October 10 | Tattoo You | Rolling Stones |
| October 17 | Tattoo You | Rolling Stones |
| October 24 | Tattoo You | Rolling Stones |
| October 31 | Tattoo You | Rolling Stones |
| November 7 | Tattoo You | Rolling Stones |
| November 14 | Tattoo You | Rolling Stones |
| November 21 | 4 | Foreigner |
| November 28 | 4 | Foreigner |
| December 5 | 4 | Foreigner |
| December 12 | 4 | Foreigner |
| December 19 | 4 | Foreigner |
| December 26 | For Those About to Rock We Salute You | AC/DC |
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