The 2003 Davis Cup was the 92nd edition of the most important tournament between nations in men's tennis.

A total of 135 nations participated in the tournament.

[1] First round losers compete in play-off ties with Zonal Group I Qualifiers.

Date: 19–21 September Panama and the US Virgin Islands promoted to Group III for 2004.

Venue: National Centre, Lagos, Nigeria (hard) Date: 5–9 February