| 2015 Davis Cup World Group | |
|---|---|
| Date | 6 March – 29 November |
| Edition | 35th |
| Champions | |
 Great Britain | |
The World Group was the highest level of Davis Cup competition in 2015. The first-round losers went into the Davis Cup World Group play-offs, and the winners progressed to the quarterfinals and World Group spot for 2016.