The 1990 Davis Cup (also known as the 1990 Davis Cup by NEC for sponsorship purposes) was the 79th edition of the Davis Cup, the most important tournament between national teams in men's tennis.

85 teams would enter the competition, 16 in the World Group, 19 in the Americas Zone, 19 in the Asia/Oceania Zone, and 31 in the Europe/Africa Zone.

Barbados, Costa Rica, Guatemala, Togo, Trinidad and Tobago and Zambia made their first appearances in the tournament.

The United States defeated Australia in the final, held at the Florida Suncoast Dome in St. Petersburg, Florida, United States, on 30 November–2 December, to win their 29th title overall.

[1][2] United States vs. Australia Date: 21–23 September The eight losing teams in the World Group first round ties and eight winners of the Zonal Group I final round ties competed in the World Group qualifying round for spots in the 1991 World Group.