The 1998 Advanta Championships of Philadelphia was a tennis tournament played on indoor carpet courts at the Philadelphia Civic Center in Philadelphia, Pennsylvania in the United States that was part of Tier II of the 1998 WTA Tour. The tournament was held from November 9 through November 15, 1998.
Women's Singles 
Steffi Graf defeated Lindsay Davenport 4–6, 6–3, 6–4
- It was Graf's 3rd title of the year and the 117th of her career.
Women's Doubles 
Elena Likhovtseva / Ai Sugiyama defeated Monica Seles / Natasha Zvereva 7–5, 4–6, 6–2
- It was Likhovtseva's 4th title of the year and the 6th of her career. It was Sugiyama's 6th title of the year and the 10th of her career.