The 1977 Grand Prix German Open was a combined men's and women's tennis tournament played on outdoor red clay courts.

It was the 69th edition of the event and was part of the 1977 Colgate-Palmolive Grand Prix circuit and categorized as a four-star event.

It took place at the Am Rothenbaum in Hamburg, West Germany, from 9 May through 15 May 1977.

Paolo Bertolucci, after a victory in the final over title-holder Manuel Orantes, and Laura duPont won the singles titles .

[3][4] Paolo Bertolucci defeated Manuel Orantes 6–3, 4–6, 6–2, 6–3 Laura duPont defeated Heidi Eisterlehner 6–1, 6–4 'Bob Hewitt / Karl Meiler defeated Phil Dent / Kim Warwick 3–6, 6–3, 6–4, 6–4 Linky Boshoff / Ilana Kloss defeated Regina Maršíková / Renáta Tomanová 2–6, 6–4, 7–5