| 1991 Virginia Slims of Washington | |
|---|---|
| Date | August 19–24 |
| Edition | 18th |
| Category | Tier II |
| Draw | 28S / 16D |
| Prize money | $350,000 |
| Surface | Hard (DecoTurf) / outdoor |
| Location | Washington, D.C., U.S. |
| Venue | William H.G. FitzGerald Tennis Center |
| Champions | |
| Singles | |
 Arantxa Sánchez Vicario | |
| Doubles | |
 Jana Novotná /  Larisa Savchenko | |
The 1991 Virginia Slims of Washington was a women's tennis tournament played on outdoor hard court at the William H.G. FitzGerald Tennis Center in Washington, D.C. in the United States and was part of the Tier II category of the 1991 WTA Tour. It was the 18th and last edition of the tournament and ran from August 19 through August 24, 1991. Second-seeded Arantxa Sánchez Vicario won the singles title and earned $70,000 first-prize money. [1]
