The 1988 WTA German Open was a women's tennis tournament played on outdoor clay courts at the Rot-Weiss Tennis Club in West Berlin and was part of Tier I of the 1988 WTA Tour. It was the 19th edition of the tournament and ran from 9 May through 15 May 1988. First-seeded Steffi Graf won the singles title.
See main article: 1988 WTA German Open – Singles. Steffi Graf defeated Helena Suková 6–3, 6–2
See main article: 1988 WTA German Open – Doubles. Isabelle Demongeot / Nathalie Tauziat defeated Claudia Kohde-Kilsch / Helena Suková 6–2, 4–6, 6–4