# List of Gaon Album Chart number ones of 2021

The Gaon Album Chart is a South Korean record chart that ranks the best-selling albums and EPs in South Korea. It is part of the Gaon Music Chart, which launched in February 2010. The data is compiled by the Ministry of Culture, Sports and Tourism and the Korea Music Content Industry Association based upon weekly/monthly physical album sales by major South Korean distributors such as Kakao Entertainment, YG Plus, Sony Music Korea, Warner Music Korea, Universal Music and Dreamus.

## Weekly charts

| Week ending date | Album | Artist |
| January 2 | Minisode1: Blue Hour | Tomorrow X Together |
| January 9 | NCT 2020 Resonance Pt. 2 | NCT |
| January 16 | The First Step: Treasure Effect | Treasure |
| January 23 | Noir | U-Know |
| January 30 | Dystopia: Road to Utopia | Dreamcatcher |
| February 6 | Hello Chapter Ø: Hello, Strange Dream | CIX |
| February 13 | 2nd Desire (Tasty) | Kim Woo-seok |
| February 20 | Be | BTS |
| February 27 | Don't Call Me | Shinee |
| March 6 | Zero: Fever Part.2 | Ateez |
| March 13 | Kick Back | WayV |
| March 20 | The Renaissance | Super Junior |
| March 27 | Lilac | IU |
| April 3 | Bambi | Baekhyun |
| April 10 | All Yours | Astro |
| April 17 | Yellow | Kang Daniel |
| April 24 | Bambi | Baekhyun |
| May 1 | Border: Carnival | Enhypen |
| May 8 | Beautiful Night | Yesung |
| May 15 | Hot Sauce | NCT Dream |
| May 22 | Hot Sauce | NCT Dream |
| May 29 | Hot Sauce | NCT Dream |
| June 5 | The Chaos Chapter: Freeze | Tomorrow X Together |
| June 12 | Don't Fight the Feeling | Exo |
| June 19 | Your Choice | Seventeen |
| June 26 | Your Choice | Seventeen |
| July 3 | Hello Future | NCT Dream |
| July 10 | Butter | BTS |
| July 17 | Butter | BTS |
| July 24 | Butter | BTS |
| July 31 | Empathy | D.O. |
| August 7 | Switch On | Astro |
| August 14 | Thrill-ing | The Boyz |
| August 21 | The Chaos Chapter: Fight or Escape | Tomorrow X Together |
| August 28 | Noeasy | Stray Kids |
| September 4 | Noeasy | Stray Kids |
| September 11 | Lalisa | Lisa |
| September 18 | Sticker | NCT 127 |
| September 25 | Sticker | NCT 127 |
| October 2 | Sticker | NCT 127 |
| October 9 | Savage | Aespa |
| October 16 | Dimension: Dilemma | Enhypen |
| October 23 | Attacca | Seventeen |
| October 30 | Attacca | Seventeen |
| November 6 | Maverick | The Boyz |
| November 13 | Formula of Love: O+T=<3 | Twice |
| November 20 | No Limit | Monsta X |
| November 27 | Rumination | SF9 |
| December 4 | Christmas EveL | Stray Kids |
| December 11 | Zero: Fever Epilogue | Ateez |
| December 18 | Universe | NCT |
| December 25 | Eleven | Ive |

## Monthly charts

| Month | Album | Artist | Sales |
| January | The First Step: Treasure Effect | Treasure | 266,894 |
| February | Be | BTS | 763,083 |
| March | Bambi | Baekhyun | 591,944 |
| April | Border: Carnival | Enhypen | 522,136 |
| May | Hot Sauce | NCT Dream | 1,995,091 |
| June | Your Choice | Seventeen | 1,391,964 |
| July | Butter | BTS | 2,490,969 |
| August | Noeasy | Stray Kids | 1,127,800 |
| September | Sticker | NCT 127 | 2,277,575 |
| October | Attacca | Seventeen | 1,968,829 |
| November | Christmas EveL | Stray Kids | 654,658 |
| December | Universe | NCT | 1,630,715 |