The Gaon Digital Chart, part of Gaon Music Chart, is a chart that ranks the best-performing songs in South Korea. The data is collected by the Korea Music Content Association. It consists of weekly (listed from Sunday to Saturday), monthly and yearly charts. Below is a list of songs that topped the weekly and monthly charts. The Digital Chart ranks songs according to their performance on the Gaon Download, Streaming, and BGM charts.[1]
| Indicates best-performing single of 2015[2] |
| January 3 | "Up & Down" (Korean: 위아래) | EXID | |
| January 10 | "Déjà-Boo" (Korean: 데자-부) | Jonghyun featuring Zion.T | |
| January 17 | "Fire" (Korean: 화) | Mad Clown featuring Jinsil of Mad Soul Child | |
| January 24 | "I Have To Forget You" (Korean: 슬픔 속에 그댈 지워야만 해) | Jeong Seung-hwan, Park Yoon-ha | |
| January 31 | "Cry Again" (Korean: 또 운다 또) | Davichi | |
| February 7 | "Just" (Korean: 그냥) | Zion.T and Crush | |
| February 14 | "You from the Same Time" (Korean: 같은 시간 속의 너) | Naul of Brown Eyed Soul | |
| February 21 | |||
| February 28 | |||
| March 7 | "Love Mash" (Korean: 사랑범벅) | MC Mong featuring Chancellor of The Channels | |
| March 14 | |||
| March 21 | "Snow of April" (Korean: 사월의 눈) | Huh Gak | |
| March 28 | "Puss" | Jimin with Iron | |
| April 4 | "Only You" (Korean: 다른 남자 말고 너) | Miss A | |
| April 11 | |||
| April 18 | "Who's Your Mama?" (Korean: 어머님이 누구니) | Park Jin-young featuring Jessi | |
| April 25 | |||
| May 2 | "Loser" | Big Bang | |
| May 9 | |||
| May 16 | |||
| May 23 | "Heart" (Korean: 마음) | IU | |
| May 30 | "View" | Shinee | |
| June 6 | "Bang Bang Bang" (Korean: 뱅뱅뱅) | Big Bang | |
| June 13 | "Love Me Right" | Exo | |
| June 20 | "Shouldn't Have" (Korean: 이럴거면 그러지말지) | Baek A-yeon featuring Younghyun | |
| June 27 | "Shake It" | Sistar | |
| July 4 | "If You" | Big Bang | |
| July 11 | "Party" | Girls' Generation | |
| July 18 | "Come and Goes" (Korean: 와리가리) | hyukoh | |
| July 25 | "Yanghwa BRDG" (Korean: 양화대교) | Zion.T | |
| August 1 | "Wi Ing Wi Ing" (Korean: 위잉위잉) | hyukoh | |
| August 8 | "Let's Not Fall In Love" (Korean: 우리 사랑하지 말아요) | Big Bang | |
| August 15 | |||
| August 22 | "Oppa's Car" (Korean: 오빠차) | Incredivle, Tablo, Jinusean | |
| August 29 | "Leon" (Korean: 레옹) | Park Myeong-soo, IU | |
| September 5 | |||
| September 12 | |||
| September 19 | "My Type" (Korean: 취향저격) | iKON | |
| September 26 | "Get Some Air" (Korean: 바람이나 좀 쐐) | Gary featuring Miwoo | |
| October 3 | "Love Again" (Korean: 또 다시 사랑) | Im Chang-jung | |
| October 10 | "I" | Taeyeon featuring Verbal Jint | |
| October 17 | "No Make Up" | Zion.T | |
| October 24 | "Twenty-three" (Korean: 스물셋) | IU | |
| October 31 | |||
| November 7 | "Boys and Girls" | Zico featuring Babylon | |
| November 14 | "Let's Hug" (Korean: 안아보자) | 4Men | |
| November 21 | "Apology" (Korean: 지못미) | iKON | |
| November 28 | "A Little Girl" (Korean: 소녀) | Oh Hyuk | |
| December 5 | "Daddy" | Psy featuring CL | |
| December 12 | "Eureka" | Zico featuring Zion.T | |
| December 19 | "This Is Love" (Korean: 사랑이 맞을거야) | Yoon Mi-rae | |
| December 26 | "Again" (Korean: 다시) | Turbo |
| Month | Song | Artist | |
|---|---|---|---|
| "Fire" (Korean: 화) | Mad Clown featuring Jinsil of Mad Soul Child | [3] | |
| "You from the Same Time" (Korean: 같은 시간 속의 너) | Naul of Brown Eyed Soul | [4] | |
| "Love Mash" (Korean: 사랑 범벅) | MC Mong featuring Chancellor of The Channel | [5] | |
| "Only You" (Korean: 다른 남자 말고 너) | Miss A | [6] | |
| "Loser" | BigBang | [7] | |
| "Bang Bang Bang" (Korean: 뱅뱅뱅) | [8] | ||
| "If You" | [9] | ||
| "Let's Not Fall In Love" (Korean: 우리 사랑하지 말아요) | [10] | ||
| "Leon" (Korean: 레옹) | Park Myeong-soo and IU | [11] | |
| "I" | Taeyeon featuring Verbal Jint | [12] | |
| "Boys and Girls" | Zico featuring Babylon | [13] | |
| "Daddy" | Psy featuring CL | [14] | |