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 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 time this feat has happened in the chart's history.
Weekly charts
| Week ending date | Song | Artist | |
| January 1 | "Good Day" | IU | |
| January 8 | "Good Day" | IU | |
| January 15 | "That Man" | Hyun Bin | |
| January 22 | "For First Time Lovers (Banmal Song)" | Jung Yong-hwa | |
| January 29 | "For First Time Lovers (Banmal Song)" | Jung Yong-hwa | |
| February 5 | "Someday" | IU | |
| February 12 | "Black & White" | G.NA | |
| February 19 | "The Story Only I Didn't Know" | IU | |
| February 26 | "The Story Only I Didn't Know" | IU | |
| March 5 | "Tonight" | Big Bang | |
| March 12 | "Going Crazy" | Song Jieun featuring Bang Yong-guk | |
| March 19 | "My Heart Beating" | K.Will | |
| March 26 | "Intuition" | CNBLUE | |
| April 2 | "Please" | Kim Bum-soo | |
| April 9 | "Please" | Kim Bum-soo | |
| April 16 | "Love Song" | BigBang | |
| April 23 | "Danger" | f(x) | |
| April 30 | "Don't Cry" | Park Bom | |
| May 7 | "Don't Cry" | Park Bom | |
| May 14 | "I Hope It Would Be That Way Now" | Park Jung-hyun | |
| May 21 | "Lonely" | 2NE1 | |
| May 28 | "If You Were Like Me" | Kim Yeon-woo | |
| June 4 | "For 1000 Days" | Ock Joo-hyun | |
| June 11 | "Don’t Forget Me" | Huh Gak | |
| June 18 | "Coordination" | JK Kim Dong-wook | |
| June 25 | "Hands Up" | 2PM | |
| July 2 | "I Am the Best" | 2NE1 | |
| July 9 | "Having an Affair" | GG featuring Park Bom | |
| July 16 | "Having an Affair" | GG featuring Park Bom | |
| July 23 | "Good-bye Baby" | Miss A | |
| July 30 | "Good-bye Baby" | Miss A | |
| August 6 | "Ugly" | 2NE1 | |
| August 13 | "So Cool" | Sistar | |
| August 20 | "I Turned Off the TV..." | Leessang featuring Yoon Mi-rae and Kwon Jung-yeol | |
| August 27 | "I Turned Off the TV..." | Leessang featuring Yoon Mi-rae and Kwon Jung-yeol | |
| September 3 | "Don't Say Goodbye" | Davichi | |
| September 10 | "Don't Say Goodbye" | Davichi | |
| September 17 | "Don't Say Goodbye" | Davichi | |
| September 24 | "Hello" | Huh Gak | |
| October 1 | "Sixth Sense" | Brown Eyed Girls | |
| October 8 | "Tokyo Girl" | Busker Busker | |
| October 15 | "Open Arms" | Ulala Session featuring Christina | |
| October 22 | "The Boys" | Girls' Generation | |
| October 29 | "The Boys" | Girls' Generation | |
| November 5 | "The Western Sky" | Ulala Session | |
| November 12 | "Be My Baby" | Wonder Girls | |
| November 19 | "Cry Cry" | T-ara | |
| November 26 | "Cry Cry" | T-ara | |
| December 3 | "You & I" | IU | |
| December 10 | "You & I" | IU | |
| December 17 | "You & I" | IU | |
| December 24 | "Trouble Maker" | Trouble Maker | |
| December 31 | "We Were in Love" | Davichi and T-ara |