The 1976 Pacific Southwest Open, also known under its sponsorship name 1976 Arco–Pacific Southwest Open, was a men's tennis tournament played on indoor carpet courts at the Pauley Pavilion in Los Angeles, California in the United States.

The event was part of the Grand Prix tennis circuit and categorized as four-star.

It was the 50th edition of the tournament and ran from September 20 through September 27, 1976.

Tenth-seeded Brian Gottfried won the singles title and $20,000 first-prize money.

[3] Brian Gottfried defeated Arthur Ashe 6–2, 6–2 Bob Lutz / Stan Smith defeated Arthur Ashe / Charlie Pasarell 6–4, 3–6, 6–4