List of Billboard Mainstream Top 40 number-one songs of 2015
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This is a list of the U.S. Billboard magazine Mainstream Top 40 number-one songs of 2015.
During 2015, a total of 19 singles hit number-one on the charts.
Chart history
| † | Indicates best-performing single of 2015[1] |
| Issue date | Song | Artist(s) | Ref. |
|---|---|---|---|
| January 3 | "Blank Space" | Taylor Swift | [2] |
| January 10 | [3] | ||
| January 17 | [4] | ||
| January 24 | [5] | ||
| January 31 | [6] | ||
| February 7 | "Uptown Funk" † | Mark Ronson featuring Bruno Mars | [7] |
| February 14 | [8] | ||
| February 21 | [9] | ||
| February 28 | [10] | ||
| March 7 | [11] | ||
| March 14 | [12] | ||
| March 21 | "Thinking Out Loud" | Ed Sheeran | [13] |
| March 28 | "Style" | Taylor Swift | [14] |
| April 4 | [15] | ||
| April 11 | [16] | ||
| April 18 | "Sugar" | Maroon 5 | [17] |
| April 25 | [18] | ||
| May 2 | "Love Me Like You Do" | Ellie Goulding | [19] |
| May 9 | [20] | ||
| May 16 | [21] | ||
| May 23 | "Earned It" | The Weeknd | [22] |
| May 30 | "See You Again" | Wiz Khalifa featuring Charlie Puth | [23] |
| June 6 | [24] | ||
| June 13 | [25] | ||
| June 20 | [26] | ||
| June 27 | "Want to Want Me" | Jason Derulo | [27] |
| July 4 | "Bad Blood" | Taylor Swift featuring Kendrick Lamar | [28] |
| July 11 | [29] | ||
| July 18 | [30] | ||
| July 25 | [31] | ||
| August 1 | [32] | ||
| August 8 | "Cheerleader" (Felix Jaehn Remix) | OMI | [33] |
| August 15 | [34] | ||
| August 22 | "Can't Feel My Face" | The Weeknd | [35] |
| August 29 | [36] | ||
| September 5 | [37] | ||
| September 12 | [38] | ||
| September 19 | "Lean On" | Major Lazer and DJ Snake featuring MØ | [39] |
| September 26 | "Good for You" | Selena Gomez featuring A$AP Rocky | [40] |
| October 3 | [41] | ||
| October 10 | "Locked Away" | R. City featuring Adam Levine | [42] |
| October 17 | [43] | ||
| October 24 | "What Do You Mean?" | Justin Bieber | [44] |
| October 31 | [45] | ||
| November 7 | "Wildest Dreams" | Taylor Swift | [46] |
| November 14 | [47] | ||
| November 21 | "Stitches" | Shawn Mendes | [48] |
| November 28 | [49] | ||
| December 5 | "Hello" | Adele | [50] |
| December 12 | [51] | ||
| December 19 | [52] | ||
| December 26 | [53] | ||