1998 Davis Cup World Group

The World Group was the highest level of Davis Cup competition in 1998. 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 1999.

Sweden were the defending champions and won their second consecutive title, defeating Italy in the final, 4–1. The final was held at the Forum di Assago in Milan, Italy, from 4 to 6 December. It was the Swedish team's 7th Davis Cup title overall.