List of Gaon Digital Chart number ones of 2017

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.^[1][2] The ranking is based collectively on each single's download sales, stream count, and background music use.^[2] In mid-2008, the Recording Industry Association of Korea ceased publishing music sales data.^[3] 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.^[4] With the creation of the Gaon Digital Chart, digital data for individual songs was provided in the country for the first time.^[3] 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.

Ailee scored the best-performing song of 2017 with "I Will Go to You Like the First Snow"

Weekly charts

Twice scored four number-one singles in 2017—"Knock Knock", "Signal", "Likey" and "Heart Shaker".

Exo's "Ko Ko Bop" topped the chart for four weeks and was the best-performing song of August.

Key

†	Indicates best-performing single of 2017[5]

Week ending date	Song	Artist(s)	Ref.
January 7	"Your Night" (당신의 밤)	Hwang Kwanghee X Gaeko featuring Oh Hyuk	[6]
January 14	"I Will Go to You like the First Snow" (첫눈처럼 너에게 가겠다) †	Ailee	[7]
January 21			[8]
January 28			[9]
February 4	"The Song" (노래)	Zion.T	[10]
February 11	"Yesterday"	Block B	[11]
February 18	"Spring Day" (봄날)	BTS	[12]
February 25	"Knock Knock"	Twice	[13]
March 4	"Fine"	Taeyeon	[14]
March 11			[15]
March 18	"Anymore" (부담이 돼)	Jung Key featuring Wheein	[16]
March 25	"Plz Don't Be Sad" (얼굴 찌푸리지 말아요)	Highlight	[17]
April 1	"Through the Night" (밤편지)	IU	[18]
April 8	"Really Really"	Winner	[19]
April 15	"Can't Love You Anymore" (사랑이 잘)	IU with Oh Hyuk	[20]
April 22	"Palette" (팔레트)	IU featuring G-Dragon	[21]
April 29			[22]
May 6	"Be Well" (아프지 마요)	Sechs Kies	[23]
May 13	"I Luv It"	Psy	[24]
May 20	"Signal"	Twice	[25]
May 27			[26]
June 3	"Lonely"	Sistar	[27]
June 10	"Untitled, 2014" (무제 (無題))	G-Dragon	[28]
June 17	"We Loved" (남이 될 수 있을까)	Bolbbalgan4 and 20 Years of Age	[29]
June 24			[30]
July 1	"Don't Know You" (널 너무 모르고)	Heize	[31]
July 8	"You, Clouds, Rain" (비도 오고 그래서)	Heize featuring Shin Yong-jae	[32]
July 15	"Red Flavor" (빨간 맛)	Red Velvet	[33]
July 22	"Ko Ko Bop"	Exo	[34]
July 29			[35]
August 5			[36]
August 12	"Energetic"	Wanna One	[37]
August 19	"Ko Ko Bop"	Exo	[38]
August 26	"Like It" (좋니)	Yoon Jong-shin	[39]
September 2	"Gashina"	Sunmi	[40]
September 9	"We Are" (시차)	Woo Won-jae featuring Loco and Gray	[41]
September 16			[42]
September 23	"Autumn Morning" (가을 아침)	IU	[43]
September 30	"Something Special" (특별해)	Sechs Kies	[44]
October 7	"Some" (썸 탈꺼야)	Bolbbalgan4	[45]
October 14	"Where You At"	NU'EST W	[46]
October 21	"Something Special" (특별해)	Sechs Kies	[47]
October 28	"Love Story" (연애소설)	Epik High featuring IU	[48]
November 4	"Likey"	Twice	[49]
November 11	"When We Were Two" (그때의 나, 그때의 우리)	Urban Zakapa	[50]
November 18	"Beautiful"	Wanna One	[51]
November 25	"Yes" (좋아)	Yoon Jong-shin and Minseo	[52]
December 2	"Emptiness in Memory" (기억의 빈자리)	Naul	[53]
December 9	"Snow" (눈)	Zion.T featuring Lee Moon-se	[54]
December 16	"Heart Shaker"	Twice	[55]
December 23	"Lonely"	Jonghyun featuring Taeyeon	[56]
December 30	"Instagram"	Dean	[57]

Monthly charts

Month	Song	Artist(s)	Downloads – Streams	Ref.
January	"I Will Go to You like the First Snow" (첫눈처럼 너에게 가겠다) †	Ailee	615,858 – 25,996,361	[58]
February			317,973 – 25,809,379	[59]
March	"Fine"	Taeyeon	437,057 – 22,063,715	[60]
April	"Can't Love You Anymore" (사랑이 잘)	IU with Oh Hyuk	561,450 – 24,564,126	[61]
May	"I Luv It"	Psy	495,775 – 22,826,190	[62]
June	"Untitled, 2014" (무제 (無題))	G-Dragon	555,587 – 22,262,836	[63]
July	"You, Clouds, Rain" (비도 오고 그래서)	Heize featuring Shin Yong-jae	559,210 – 34,582,285	[64]
August	"Ko Ko Bop"	Exo	411,635 – 16,268,825	[65]
September	"We Are" (시차)	Woo Won-jae featuring Loco and Gray	511,542 – 28,649,846	[66]
October	"Something Special" (특별해)	Sechs Kies	391,254 – 5,163,437	[67]
November	"Gift" (선물)	MeloMance	349,010 – 31,002,949	[68]
December	"Emptiness in Memory" (기억의 빈자리)	Naul	375,205 – 24,457,856	[69]