Jan Gunnarsson (born 30 May 1962 Olofström, Blekinge län) is a former Swedish tennis player.
Gunnarsson was in 1979 at the finals of the junior tournament, the U.S. Open, where he lost to Scott Davis. In the same year he retired during training with Björn Borg a knee injury since he always approached with a knee bandage. In 1982 he became Swedish national indoor champion, the same year he won his first doubles title in Stockholm on the ATP World Tour. In 1985, he was able to win the only individual title of his career in Vienna, another four times he was in the course of his career in a single final. He won nine doubles titles and stood ten more times in a double finals. Its highest listing in the tennis world ranking he reached in 1985 with position 25 in the singles and in 1984 with position 20 in doubles.
His best individual result at a Grand Slam tournament was the semi-finals at the Australian Open 1989. After victories among others, Henri Leconte and Jonas Svensson was defeated Miloslav Mečíř clear in three sets. In doubles, he reached the second round of the 1985 French Open.
Gunnarsson graduated between 1985 and 1990, a single and four double batches for the Swedish Davis Cup team. His greatest success with the team was in the finals in 1989. During the 2-3 defeat against Germany, he lost alongside Anders Järryd in five sets against Boris Becker and Eric Jelen.