The 1990 Swedish Open was a combined men's and women's tennis tournament played on outdoor clay courts in Båstad, Sweden. It was part of the World Series of the 1990 ATP Tour and of the Tier V category of the 1990 WTA Tour. It was the 43rd edition of the tournament and was held from 9 July until 15 July 1990. Richard Fromberg and Sandra Cecchini won the singles titles.
See main article: 1990 Swedish Open – Men's singles. 
Richard Fromberg defeated 
Magnus Larsson, 6–2, 7–6
Sandra Cecchini defeated Csilla Bartos, 6–1, 6–2
See main article: 1990 Swedish Open – Men's doubles. Ronnie Båthman / Rikard Bergh defeated Jan Gunnarsson / Udo Riglewski, 6–1, 6–4
Mercedes Paz / Tine Scheuer-Larsen defeated Carin Bakkum / Nicole Muns-Jagerman 6–3, 6–7(10–12), 6–2