# List of Gaon Digital Chart number ones of 2018

The Gaon Digital Chart is a chart that ranks the best-performing singles in South Korea. Managed by the domestic Ministry of Culture, Sports and Tourism (MCST), its data is compiled by the Korea Music Content Industry Association and published by the Gaon Music Chart. The ranking is based collectively on each single's download sales, stream count, and background music use. In mid-2008, the Recording Industry Association of Korea ceased publishing music sales data. The MCST established a process to collect music sales in 2009, and began publishing its data with the introduction of the Gaon Music Chart the following February. With the creation of the Gaon Digital Chart, digital data for individual songs was provided in the country for the first time. Gaon provides weekly (listed from Sunday to Saturday), monthly and yearly charts. Below is a list of singles that topped the weekly and monthly charts.

## Weekly charts

Key :
| † | Indicates best-performing single of 2018 |
| Week ending date | Song | Artist(s) |
| January 6 | "Sound of Winter" (겨울소리) | Park Hyo-shin |
| January 13 | "Good Old Days" (그날처럼) | Jang Deok Cheol |
| January 20 | "Good Old Days" (그날처럼) | Jang Deok Cheol |
| January 27 | "Good Old Days" (그날처럼) | Jang Deok Cheol |
| February 3 | "Love Scenario" (사랑을 했다) † | iKON |
| February 10 | "Love Scenario" (사랑을 했다) † | iKON |
| February 17 | "Love Scenario" (사랑을 했다) † | iKON |
| February 24 | "Love Scenario" (사랑을 했다) † | iKON |
| March 3 | "Love Scenario" (사랑을 했다) † | iKON |
| March 10 | "Love Scenario" (사랑을 했다) † | iKON |
| March 17 | "Flower Road" (꽃 길) | Big Bang |
| March 24 | "Flower Road" (꽃 길) | Big Bang |
| March 31 | "Flower Road" (꽃 길) | Big Bang |
| April 7 | "Bar Code" (바코드) | Haon and Vinxen |
| April 14 | "What Is Love?" | Twice |
| April 21 | "Pass By" | Nilo |
| April 28 | "Don't Give It to Me" (주지마) | Loco and Hwasa |
| May 5 | "Don't Give It to Me" (주지마) | Loco and Hwasa |
| May 12 | "Don't Give It to Me" (주지마) | Loco and Hwasa |
| May 19 | "Don't Give It to Me" (주지마) | Loco and Hwasa |
| May 26 | "Fake Love" | BTS |
| June 2 | "Travel" (여행) | Bolbbalgan4 |
| June 9 | "Travel" (여행) | Bolbbalgan4 |
| June 16 | "Travel" (여행) | Bolbbalgan4 |
| June 23 | "Ddu-Du Ddu-Du" (뚜두뚜두) | Blackpink |
| June 30 | "Ddu-Du Ddu-Du" (뚜두뚜두) | Blackpink |
| July 7 | "Ddu-Du Ddu-Du" (뚜두뚜두) | Blackpink |
| July 14 | "Dance the Night Away" | Twice |
| July 21 | "Way Back Home" | Shaun |
| July 28 | "Way Back Home" | Shaun |
| August 4 | "SoulMate" | Zico featuring IU |
| August 11 | "Power Up" | Red Velvet |
| August 18 | "Power Up" | Red Velvet |
| August 25 | "Way Back Home" | Shaun |
| September 1 | "Idol" | BTS |
| September 8 | "Siren" (사이렌) | Sunmi |
| September 15 | "Siren" (사이렌) | Sunmi |
| September 22 | "The Hardest Part" (우리 그만하자) | Roy Kim |
| September 29 | "There Has Never Been a Day I Haven't Loved You" (하루도 그대를 사랑하지 않은 적이 없었다) | Im Chang-jung |
| October 6 | "There Has Never Been a Day I Haven't Loved You" (하루도 그대를 사랑하지 않은 적이 없었다) | Im Chang-jung |
| October 13 | "Bbibbi" (삐삐) | IU |
| October 20 | "Bbibbi" (삐삐) | IU |
| October 27 | "Bbibbi" (삐삐) | IU |
| November 3 | "Me After You" (너를 만나) | Paul Kim |
| November 10 | "Yes or Yes" | Twice |
| November 17 | "Solo" | Jennie |
| November 24 | "Solo" | Jennie |
| December 1 | "Fiancé" (아낙네) | Mino |
| December 8 | "Fiancé" (아낙네) | Mino |
| December 15 | "180 Degrees" (180도) | Ben |
| December 22 | "180 Degrees" (180도) | Ben |
| December 29 | "180 Degrees" (180도) | Ben |

## Monthly charts

| Month | Song | Artist(s) |
| January | "Good Old Days" (그날처럼) | Jang Deok Cheol |
| February | "Love Scenario" (사랑을 했다) | iKON |
| March | "Starry Night" (별이 빛나는 밤) | Mamamoo |
| April | "Pass By" | Nilo |
| May | "Don't Give It to Me" (주지마) | Loco and Hwasa |
| June | "Travel" (여행) | Bolbbalgan4 |
| July | "Ddu-Du Ddu-Du" (뚜두뚜두) | Blackpink |
| August | "Way Back Home" | Shaun |
| September | "Siren" (사이렌) | Sunmi |
| October | "Bbibbi" (삐삐) | IU |
| November | "Me After You" (너를 만나) | Paul Kim |
| December | "Fiancé" (아낙네) | Mino |