| 1998 Boston Cup | |
|---|---|
| Date | August 10–16 |
| Edition | Only |
| Category | Tier III |
| Draw | 30S / 16D |
| Prize money | $164,250 |
| Surface | Hard / outdoor |
| Location | Chestnut Hill, MA, U.S. |
| Venue | Longwood Cricket Club |
| Champions | |
| Singles | |
 Mariaan de Swardt | |
| Doubles | |
 Lisa Raymond /  Rennae Stubbs | |
The 1998 Boston Cup was a tennis tournament played on outdoor hard courts at the Longwood Cricket Club in Chestnut Hill, Massachusetts in the United States that was part of Tier III of the 1998 WTA Tour. It was the only edition of the tournament and was held from August 10 through August 16, 1998. Unseeded Mariaan de Swardt won the singles title and earned $27,000 first-prize money.
Mariaan de Swardt defeated 
Barbara Schett 3–6, 7–6, 7–5
Lisa Raymond / Rennae Stubbs defeated Mariaan de Swardt / Mary Joe Fernández 6–4, 6–4
