# List of M Countdown Chart winners (2015)

The M Countdown Chart is a record chart on the South Korean Mnet television music program M Countdown. Every week, the show awards the best-performing single on the chart in the country during its live broadcast.
In 2015, 30 singles ranked number one on the chart and 25 music acts were awarded first-place trophies. Four songs collected trophies for three weeks and achieved a triple crown: "Sniper" by Shinhwa, "Call Me Baby" by Exo, "Lion Heart" by Girls' Generation and "I" by Taeyeon. No release for the year earned a perfect score, but "Lion Heart" acquired the highest point total on the September 3 broadcast with a score of 10,988.

## Scoring system
### February 27, 2014–June 4, 2015

Songs that appeared on the show from January 1–June 4 were scored based on a combination of digital single sales (50%), album sales (10%), social media performance (official YouTube music video views and SNS buzz: 10%), preference points (global fan votes and age range preference: 10%), Mnet's broadcast score (10%), and SMS votes (10%), for a total of 11,000 points.

### June 11, 2015–April 12, 2018

Mnet changed its scoring system effective the June 11 broadcast. Digital sales still accounted for 50% of a song's score, but points for album sales and social media performance were increased to 15% each. The popularity, broadcast, and voting percentages remained unchanged. No song achieved a perfect score under either system for the year.

## Chart history

Key :
| | Triple Crown |
| | Highest score in 2015 |
| — | No show was held |
| Episode | Date | Artist | Song | Points |
| — | January 1 | No.1 Special | No.1 Special | No.1 Special |
| 407 | January 8 | EXID | "Up & Down" | — |
| 408 | January 15 | EXID | "Up & Down" | — |
| 409 | January 22 | Jonghyun | "Déjà-Boo" | 6,995 |
| 410 | January 29 | Mad Clown | "Fire" | 7,409 |
| 411 | February 5 | Davichi | "Cry Again" | 7,238 |
| 412 | February 12 | Infinite H | "Pretty" | 7,209 |
| — | February 19 | 4Minute | "Crazy" | — |
| 413 | February 26 | 4Minute | "Crazy" | 8,636 |
| 414 | March 5 | VIXX | "Love Equation" | 8,403 |
| 415 | March 12 | Shinhwa | "Sniper" | — |
| 416 | March 19 | Shinhwa | "Sniper" | 7,965 |
| 417 | March 26 | Shinhwa | "Sniper" | 8,554 |
| 418 | April 2 | Red Velvet | "Ice Cream Cake" | 8,069 |
| 419 | April 9 | Exo | "Call Me Baby" | 7,745 |
| 420 | April 17 | Exo | "Call Me Baby" | 7,756 |
| 421 | April 23 | KCON Japan Special Episode, winners were not announced | KCON Japan Special Episode, winners were not announced | KCON Japan Special Episode, winners were not announced |
| 422 | April 30 | Exo | "Call Me Baby" | 7,652 |
| 423 | May 7 | BTS | "I Need U" | 6,876 |
| 424 | May 14 | Big Bang | "Loser" | 9,669 |
| 425 | May 21 | Big Bang | "Loser" | 8,188 |
| 426 | May 28 | Shinee | "View" | 9,037 |
| 427 | June 4 | Shinee | "View" | 9,762 |
| 428 | June 11 | BigBang | "Bang Bang Bang" | 9,669 |
| 429 | June 18 | Exo | "Love Me Right" | 9,238 |
| 430 | June 25 | BigBang | "Bang Bang Bang" | 9,124 |
| 431 | July 2 | Sistar | "Shake It" | — |
| 432 | July 9 | BigBang | "Sober" | 8,487 |
| 433 | July 16 | Girls' Generation | "Party" | 10,654 |
| 434 | July 23 | Infinite | "Bad" | 8,851 |
| 435 | July 30 | Apink | "Remember" | 9,244 |
| 436 | August 6 | Beast | "YeY" | — |
| 437 | August 13 | KCON LA Special Episode, winners were not announced | KCON LA Special Episode, winners were not announced | KCON LA Special Episode, winners were not announced |
| 438 | August 15 | KCON NY Special Episode, winners were not announced | KCON NY Special Episode, winners were not announced | KCON NY Special Episode, winners were not announced |
| 439 | August 20 | GD & TOP | "Zutter" | 10,741 |
| 440 | August 27 | Girls' Generation | "Lion Heart" | 9,868 |
| 441 | September 3 | Girls' Generation | "Lion Heart" | 10,988 |
| 442 | September 10 | Girls' Generation | "Lion Heart" | 10,961 |
| 443 | September 17 | Red Velvet | "Dumb Dumb" | 10,085 |
| 444 | September 24 | Red Velvet | "Dumb Dumb" | — |
| 445 | October 1 | Soyou & Kwon Jeong Yeol | "Lean On Me" | 7,137 |
| 446 | October 8 | iKon | "Rhythm Ta" | 7,068 |
| 447 | October 15 | Taeyeon | "I" | 10,929 |
| 448 | October 22 | Taeyeon | "I" | 9,541 |
| 449 | October 29 | Taeyeon | "I" | 10,093 |
| 450 | November 5 | f(x) | "4 Walls" | 10,688 |
| — | November 12 | No Broadcast or Winner | No Broadcast or Winner | No Broadcast or Winner |
| 451 | November 19 | f(x) | "4 Walls" | — |
| 452 | November 26 | Dynamic Duo | "Jam" | — |
| — | December 3 | No Broadcast or Winner | No Broadcast or Winner | No Broadcast or Winner |
| — | December 10 | No Broadcast or Winner | No Broadcast or Winner | No Broadcast or Winner |
| 453 | December 17 | Psy | "Daddy" | — |
| 454 | December 24 | Psy | "Daddy" | — |
| — | December 31 | No Broadcast or Winner | No Broadcast or Winner | No Broadcast or Winner |