1991 Virginia Slims of Washington – Singles
| Singles | |
|---|---|
| 1991 Virginia Slims of Washington | |
| Champion | Arantxa Sánchez Vicario |
| Runner-up | Katerina Maleeva |
| Score | 6–2, 7–5 |
| Draw | 28 |
| Seeds | 9 |
Martina Navratilova was the defending champion, but did not compete this year.
Arantxa Sánchez Vicario won the title by defeating Katerina Maleeva 6–2, 7–5 in the final.