The 2005 Davis Cup was the 94th edition of the most important tournament between nations in men's tennis.

The final took place 2–4 December at the Sibamac Arena in Bratislava, Slovakia, with Croatia defeating Slovakia for their first title.

[1][2][3] First round losers compete in play-off ties with Zonal Group I Qualifiers.

Date: 23–25 September Venue: Club de Tenis La Paz, La Paz, Bolivia (clay) Date: Week of 28 February (scores in italics carried over from Groups) Trinidad & Tobago and Costa Rica promoted to Group III for 2006.

Venue: Victoria Park Tennis Centre, Causeway Bay, Hong Kong (hard) Date: 13–17 July (scores in italics carried over from Groups) Venue: Thein Byu Tennis Club, Yangon, Myanmar (hard) Date: 27 April–01 May Venue: Smash Tennis Academy, Cairo, Egypt (clay) Date: 27 April – 1 May (scores in italics carried over) Venue: Fitzwilliam Lawn Tennis Club, Dublin, Ireland (grass) Date: 13–17 July (scores in italics carried over) Venue: Lugogo Tennis Club, Kampala, Uganda (clay) Date: 1–5 March