| Champ: | Martina Hingis |
| Runner: | Amanda Coetzer |
| Score: | 6–2, 6–1 |
| Type: | singles doubles |
| Draw: | 28 (4 / 3) |
| Seeds: | 8 |
| Before Name: | Toray Pan Pacific Open – Singles |
| After Name: | Toray Pan Pacific Open – Singles |
| Main Name: | Pan Pacific Open |
Martina Hingis defeated Amanda Coetzer in the final, 6–2, 6–1 to win the singles tennis title at the 1999 Pan Pacific Open.
Lindsay Davenport was the defending champion, but lost in the quarterfinals to Coetzer.
The top four seeds received a bye to the second round.