List of Gaon Digital Chart number ones of 2011

The Gaon Digital Chart 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 (KMCA) and ranks songs according to their performance on the Gaon Download, Streaming and BGM charts. Below is a list of songs that topped the weekly and monthly charts. The actual overall best-performing song on the chart of 2011, T-ara's "Roly-Poly", did not top any weekly or monthly chart—becoming the first (and, so far, only) time this feat has happened in the chart's history.

Despite not reaching number-one, T-ara's "Roly-Poly" landed atop the year-end chart for 2011, and was the best-selling song of the year.

Weekly charts

IU had 4 number-one hits in 2011, the most of any artist during the year.

2NE1 had 3 number-one hits in 2011, with "Lonely", "I Am the Best", and "Ugly".

T-ara had 2 number-one hits in 2011, with "Cry Cry" and "We Were in Love", featuring Davichi.

Week ending date	Song	Artist	Ref.
January 1	"Good Day" (좋은 날)	IU	[1]
January 8			[2]
January 15	"That Man" (그 남자)	Hyun Bin	[3]
January 22	"For First Time Lovers (Banmal Song)" (처음 사랑하는 연인들을 위해 (반말송))	Jung Yong-hwa	[4]
January 29			[5]
February 5	"Someday"	IU	[6]
February 12	"Black & White"	G.NA	[7]
February 19	"The Story Only I Didn't Know" (나만 몰랐던 이야기)	IU	[8]
February 26			[9]
March 5	"Tonight"	Big Bang	[10]
March 12	"Going Crazy" (미친거니)	Song Jieun featuring Bang Yong-guk	[11]
March 19	"My Heart Beating" (가슴이 뛴다)	K.Will	[12]
March 26	"Intuition" (직감)	CNBLUE	[13]
April 2	"Please" (제발)	Kim Bum-soo	[14]
April 9			[15]
April 16	"Love Song"	BigBang	[16]
April 23	"Danger" (피노키오)	f(x)	[17]
April 30	"Don't Cry"	Park Bom	[18]
May 7			[19]
May 14	"I Hope It Would Be That Way Now" (이젠 그랬으면 좋겠네)	Park Jung-hyun	[20]
May 21	"Lonely"	2NE1	[21]
May 28	"If You Were Like Me" (나와 같다면)	Kim Yeon-woo	[22]
June 4	"For 1000 Days" (천일동안)	Ock Joo-hyun	[23]
June 11	"Don’t Forget Me" (나를 잊지 말아요)	Huh Gak	[24]
June 18	"Coordination" (조율)	JK Kim Dong-wook	[25]
June 25	"Hands Up"	2PM	[26]
July 2	"I Am the Best" (내가 제일 잘 나가)	2NE1	[27]
July 9	"Having an Affair" (바람났어)	GG (Park Myung-soo & G-Dragon) featuring Park Bom	[28]
July 16			[29]
July 23	"Good-bye Baby"	Miss A	[30]
July 30			[31]
August 6	"Ugly"	2NE1	[32]
August 13	"So Cool"	Sistar	[33]
August 20	"I Turned Off the TV..." (TV를 껐네...)	Leessang featuring Yoon Mi-rae and Kwon Jung-yeol	[34]
August 27			[35]
September 3	"Don't Say Goodbye" (안녕이라고 말하지마)	Davichi	[36]
September 10			[37]
September 17			[38]
September 24	"Hello"	Huh Gak	[39]
October 1	"Sixth Sense"	Brown Eyed Girls	[40]
October 8	"Tokyo Girl" (동경소녀)	Busker Busker	[41]
October 15	"Open Arms"	Ulala Session featuring Christina	[42]
October 22	"The Boys"	Girls' Generation	[43]
October 29			[44]
November 5	"The Western Sky" (서쪽 하늘)	Ulala Session	[45]
November 12	"Be My Baby"	Wonder Girls	[46]
November 19	"Cry Cry"	T-ara	[47]
November 26			[48]
December 3	"You & I" (너랑 나)	IU	[49]
December 10			[50]
December 17			[51]
December 24	"Trouble Maker"	Trouble Maker	[52]
December 31	"We Were in Love" (우리 사랑했잖아)	Davichi and T-ara	[53]

Monthly charts

Source: Gaon Monthly Digital Chart

Month	Song	Artist	Aggregate points	Total downloads	Year-end position	Ref.
January	"That Man"	Hyun Bin	–	–	39	[54]
February	"The Story Only I Didn't Know"	IU	–	–	10	[55]
March	"My Heart Beating"	K.Will	158,316,435	1,113,984	13	[56]
April	"Love Song"	BigBang	146,984,191	1,098,775	27	[57]
May	"Lonely"	2NE1	190,313,245	1,477,729	4	[58]
June	"Starlight Moonlight"	Secret	143,129,339	1,373,180	15	[59]
July	"Having an Affair"	GG (Park Myung-soo & G-Dragon) feat. Park Bom	268,055,358	2,623,583	2	[60]
August	"I Turned Off the TV..."	Leessang feat. Yoon Mi-rae & Kwon Jung-yeol	134,997,784	1,524,068	23	[61]
September	"Don't Say Goodbye"	Davichi	135,249,438	1,595,977	18	[62]
October	"Tokyo Girl"	Busker Busker	135,234,443	1,831,105	52	[63]
November	"Be My Baby"	Wonder Girls	171,813,840	2,186,473	33	[64]
December	"You and I" (너랑 나)	IU	161,517,725	1,854,143	36	[65]