The 1979 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 1979 Colgate-Palmolive Grand Prix circuit.

The singles event had a field of 64 players.

First-seeded John McEnroe won his second consecutive singles title at the event.

John McEnroe defeated Peter Fleming 4–6, 7–5, 6–2 Peter Fleming / John McEnroe defeated Wojciech Fibak / Frew McMillan 6–1, 6–4