1990 Davis Cup World Group

The World Group was the highest level of Davis Cup competition in 1990. The first-round losers went into the Davis Cup World Group qualifying round, and the winners progressed to the quarterfinals and were guaranteed a World Group spot for 1991.

West Germany were the defending champions, but were eliminated in the quarterfinals.

The United States won the title, defeating Australia in the final, 3–2. The final was held at the Florida Suncoast Dome in St. Petersburg, Florida, United States, from 30 November to 2 December. It was the US team's 29th Davis Cup title overall and their first since 1982.