| 2003 Davis Cup World Group | |
|---|---|
| Date | 7 February – 30 November |
| Edition | 23rd |
| Champions | |
 Australia | |
The World Group was the highest level of Davis Cup competition in 2003. The first-round losers went into the Davis Cup World Group playoffs, and the winners progress to the quarterfinals. The quarterfinalists were guaranteed a World Group spot for 2004.