1998 IGA Tennis Classic
| 1998 IGA Classic | |
|---|---|
| Date | February 23 – March 1 |
| Edition | 13th |
| Category | Tier III |
| Surface | Hard / Indoor |
| Location | Oklahoma City, OK, USA |
| Champions | |
| Singles | |
 Venus Williams | |
| Doubles | |
| Serena Williams / Venus Williams | |
The 1998 IGA Classic was a women's tennis tournament played on indoor hard courts at The Greens Country Club in Oklahoma City, Oklahoma in the United States that was part of Tier III of the 1998 WTA Tour. It was the 13th edition of the tournament and was held from February 23 through March 1, 1998.
Winners
Women's Singles
Venus Williams defeated 
Joannette Kruger 6–3, 6–2
- It was Williams' 1st title of the year and the 1st of her career.
Women's Doubles
Serena Williams / Venus Williams defeated 
Cătălina Cristea / 
Kristine Kunce 7–5, 6–2
- It was Serena Williams' 1st title of the year and the 1st of her career. It was Venus Williams' 2nd title of the year and the 2nd of her career.