1980 Transamerica Open

The 1980 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 Super Series of the 1980 Volvo Grand Prix circuit. It was the 92nd edition of the tournament and was held from September 22 through September 28, 1980. Third-seeded Gene Mayer won the singles title and earned $27,500 first-prize money.

1980 Transamerica Open
Date	September 22–28
Edition	92nd
Category	Grand Prix (Super Series)
Draw	48S / 24D
Prize money	$175,000
Surface	Carpet / indoor
Location	San Francisco, California, U.S.
Venue	Cow Palace
Champions
Singles
Gene Mayer[1]
Doubles
John McEnroe / Peter Fleming[2]

Finals

Singles

Gene Mayer defeated Eliot Teltscher 6–2, 2–6, 6–1

• It was Mayer's 5th singles title of the year and the 7th of his career.

Doubles

John McEnroe / Peter Fleming defeated Gene Mayer / Sandy Mayer 6–1, 6–4