1975 Pacific Coast Open – Singles

The 1975 Pacific Coast Open – Singles was an event of the 1975 Pacific Coast Open tennis tournament and was played on outdoor hard courts at the Cow Palace in San Francisco in the United States between September 22 and September 28, 1975. The draw comprised 64 players and 16 of them were seeded. Ross Case was the defending Pacific Coast Open singles champion but did not take part in this edition. Second-seeded Arthur Ashe won the title by defeating first-seeded Guillermo Vilas 6–0, 7–6(7–4) in the final.

Seeds
• 🇦🇷 Guillermo Vilas (final)

• 🇺🇸 Arthur Ashe (champion)

• 🇺🇸 Roscoe Tanner (first round)

• 🇲🇽 Raúl Ramírez (second round)

• (Withdrew)

• 🇺🇸 Harold Solomon (first round)

• 🇺🇸 Marty Riessen (first round)

• 🇳🇿 Onny Parun (second round)

• 🇺🇸 Cliff Richey (third round)

• 🇺🇸 Dick Stockton (quarterfinals)

• 🇺🇸 Brian Gottfried (third round)

• 🇺🇸 Bob Lutz (quarterfinals)

• 🇺🇸 Sandy Mayer (quarterfinals)

• 🇦🇺 Kim Warwick (second round)

• 🇺🇸 Charlie Pasarell (third round)

• Cliff Drysdale (quarterfinals)