List of Gaon Album Chart number ones of 2015
The Gaon Album Chart is a 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 for the chart is compiled by the Ministry of Culture, Sports and Tourism and the Korean Music Content Industry Association based on weekly and monthly physical albums and digital sales by six major distributors: LOEN Entertainment, S.M. Entertainment, Sony Music Korea, Warner Music Korea, Universal Music and Mnet Media.
Overall, EXO's Exodus album was Gaon Album Chart best selling album of 2015, selling 478,856 copies. The group also sold South Korea best-selling album of 2015 with all standard Exodus and each of its reissue Exodus , Love Me Right and Love Me Right albums selling a total of 1,211,237 units overall. The group won Album of The Year at 2015 Mnet Asian Music Awards, Album of The Year and at 5th Gaon Chart Music Awards, Disk Daesang and Disk Bonsang at 30th Golden Disc Awards and Album of The Year at 2015 Melon Music Awards.
Weekly charts
| Week | Album | Artist | |
| EXO | |||
| Deja Vu | Sonamoo | ||
| The Winter's Tale | BtoB | ||
| Base | Jonghyun | ||
| One Fine Day | Jung Yong-hwa | ||
| Fly Again | Infinite H | ||
| One Fine Day | Jung Yong-hwa | ||
| Fly Again | Infinite H | ||
| oNIELy | Niel | ||
| Boys' Record | VIXX | ||
| Flower | XIA | ||
| The Beat Goes On | Super Junior-D&E | ||
| Ice Cream Cake | Red Velvet | ||
| I Will | F.T. Island | ||
| Exodus | EXO | ||
| Exodus | EXO | ||
| Exodus | EXO | ||
| Exodus | EXO | ||
| M | Big Bang | ||
| The Most Beautiful Moment In Life, Part 1 | BTS | ||
| 27 | Kim Sung-kyu | ||
| Odd | SHINee | ||
| Odd | SHINee | ||
| Love Me Right | EXO | ||
| Love Me Right | EXO | ||
| No.5 | 2PM | ||
| Natural Born Teen Top | Teen Top | ||
| Complete | BtoB | ||
| D | Big Bang | ||
| Reality | Infinite | ||
| Rise as God | TVXQ | ||
| Ordinary | Beast | ||
| Married to the Music | SHINee | ||
| E | Big Bang | ||
| Lion Heart | Girls' Generation | ||
| Lion Heart | Girls' Generation | ||
| Song Il Kook's Triplets Classic | Various Artist | ||
| The Red | Red Velvet | ||
| Magic | Super Junior | ||
| 2gether | CNBLUE | ||
| MAD | Got7 | ||
| Welcome Back | iKON | ||
| Fall, Once Again | Kyuhyun | ||
| Yesterday | XIA | ||
| 4 Walls | f | ||
| Winner Of XVII International Chopin Piano Competition | Cho Seong-Jin | ||
| Chained Up | VIXX | ||
| Matrix | B.A.P | ||
| Matrix | B.A.P | ||
| The Most Beautiful Moment In Life, Part 2 | BTS | ||
| Sing for You | EXO | ||
| Sing for You | EXO | ||
| Welcome Back | iKON |
Monthly charts
| Month | Album | Artist | Sales |
| One Fine Day | Jung Yong-hwa | 75,886 | |
| Boys' Record | VIXX | 54,997 | |
| Exodus | EXO | 277,087 | |
| Exodus | EXO | 175,782 | |
| Odd | SHINee | 165,346 | |
| Love Me Right | EXO | 268,821 | |
| Rise as God | TVXQ | 148,155 | |
| Lion Heart | Girls' Generation | 131,228 | |
| Magic | Super Junior | 90,504 | |
| I | Taeyeon | 100,923 | |
| The Most Beautiful Moment In Life, Part 2 | BTS | 144,640 | |
| Sing for You | EXO | 318,698 |