The 1983 Transamerica Open, also known as the Pacific Coast Championships, was a men's tennis tournament played on indoor carpet courts at the Cow Palace in San Francisco, California in the United States.

The event was part of the 1983 Volvo Grand Prix circuit.

The singles event had a field of 32 players.

Second-seeded Ivan Lendl won the singles title.

[3] Ivan Lendl defeated John McEnroe 3–6, 7–6(7–4), 6–4 Peter Fleming / John McEnroe defeated Ivan Lendl / Vincent Van Patten 6–1, 6–2