List of Gaon Digital Chart number ones of 2010
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, 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 weekly download sales, stream count, and background music usage. 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 publicly 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.
In 2010, 35 singles claimed the top spot in 52 weeks of rankings. Gain and Jo Kwon's collaboration "We Fell in Love" became the first song to top the Digital Chart, doing so for three consecutive weeks. "Bad Girl Good Girl" by Miss A, the quartet's debut single, spent four consecutive weeks at number one on the Gaon Digital Chart. It went on to become the best-performing single of 2010, topping the year-end chart. Girls' Generation topped the chart with three different songs, more than any other act. On the monthly chart, Girls' Generation and IU had the most number-one singles, with two each. 2AM logged the most entries on the year-end chart, with five songs ranking in the top 100. "Can't Let You Go Even If I Die" was the most-downloaded song with 3,352,827 in sales.
Weekly chart
| Indicates best-performing single of 2010 |
| Week ending | Song | Artist | |
| January 2 | "We Fell in Love" | Gain and Jo Kwon | |
| January 9 | "We Fell in Love" | Gain and Jo Kwon | |
| January 16 | "We Fell in Love" | Gain and Jo Kwon | |
| January 23 | "Can't Let You Go Even If I Die" | 2AM | |
| January 30 | "Can't Let You Go Even If I Die" | 2AM | |
| February 6 | "Oh!" | Girls' Generation | |
| February 13 | "Try to Follow Me" | 2NE1 | |
| February 20 | "Lupin" | Kara | |
| February 27 | "Lupin" | Kara | |
| March 6 | "I Go Crazy Because of You" | T-ara | |
| March 13 | "I Go Crazy Because of You" | T-ara | |
| March 20 | "Run Devil Run" | Girls' Generation | |
| March 27 | "Run Devil Run" | Girls' Generation | |
| April 3 | "Love Song" | Rain | |
| April 10 | "Swing" | Lee Hyori featuring Gary | |
| April 17 | "Chitty Chitty Bang Bang" | Lee Hyori featuring Ceejay | |
| April 24 | "Without U" | 2PM | |
| May 1 | "Spiteful Words" | Seo Young-eun featuring Jungyup | |
| May 8 | "Nu ABO" | f | |
| May 15 | "Time Please Stop" | Davichi | |
| May 22 | "2 Different Tears" | Wonder Girls | |
| May 29 | "2 Different Tears" | Wonder Girls | |
| June 5 | "2 Different Tears" | Wonder Girls | |
| June 12 | "Nagging" | IU with Seulong | |
| June 19 | "Nagging" | IU with Seulong | |
| June 26 | "Nagging" | IU with Seulong | |
| July 3 | "Sick Enough to Die" | MC Mong featuring Mellow | |
| July 10 | "Bad Girl Good Girl" | miss A | |
| July 17 | "Bad Girl Good Girl" | miss A | |
| July 24 | "Bad Girl Good Girl" | miss A | |
| July 31 | "Bad Girl Good Girl" | miss A | |
| August 7 | "I'm a Guy Like This" | DJ DOC | |
| August 14 | "I Was Able to Eat Well" | Homme | |
| August 21 | "Madonna" | Secret | |
| August 28 | "I Was Able to Eat Well" | Homme | |
| September 4 | "Love Love Love" | F.T. Island | |
| September 11 | "Why" | Supreme Team featuring Young Jun | |
| September 18 | "Go Away" | 2NE1 | |
| September 25 | "Go Away" | 2NE1 | |
| October 2 | "It's You" | Sung Si-kyung with IU | |
| October 9 | "Then Then Then" | Supreme Team featuring Young Jun | |
| October 16 | "Irreversible" | Gain | |
| October 23 | "By Instinct" | Kang Seung-yoon featuring Swings | |
| October 30 | "Hoot" | Girls' Generation | |
| November 6 | "You Wouldn't Answer My Calls" | 2AM | |
| November 13 | "Always" | Huh Gak | |
| November 20 | "Always" | Huh Gak | |
| November 27 | "Like A Star" | Taeyeon and The One | |
| December 4 | "If It's Same" | Brown Eyed Soul | |
| December 11 | "Good Day" | IU | |
| December 18 | "Good Day" | IU | |
| December 25 | "Good Day" | IU |