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. The tournament was held from August 10 through August 16, 1998.
Mariaan de Swardt defeated Barbara Schett 3–6, 7–6, 7–5
- It was de Swardt's 2nd title of the year and the 4th of her career.
Lisa Raymond / Rennae Stubbs defeated Mariaan de Swardt / Mary Joe Fernández 6–4, 6–4
- It was Raymond's 2nd title of the year and the 11th of her career. It was Stubbs' 2nd title of the year and the 15th of her career.
Template:Boston Cup tournaments