1986 Davis Cup World Group

The World Group was the highest level of Davis Cup competition in 1986.

Australia won the title, defeating the two-time defending champions Sweden in the final, 3–2. The final was held at the Kooyong Stadium in Melbourne, Australia, from 26 to 28 December. It was the Australian team's first Davis Cup title since 1983 and their 26th Davis Cup title overall.

Relegation play-offs
The first-round losers played in the Relegation Play-offs. The winners of the play-offs advanced to the 1987 Davis Cup World Group, and the losers were relegated to their respective Zonal Regions.

Results summary
Date: 3–5 October


 * ,, and  remain in the World Group in 1987.
 * ,, and  are relegated to Zonal competition in 1987.