| Date: | March 5–15 |
| Edition: | 25th |
| Prize Money: | $2,200,000 |
| Category: | Super 9 (ATP) Tier I Series (WTA) |
| Surface: | Hard / outdoor |
| Location: | Indian Wells, CA, US |
| Venue: | Grand Champions Resort |
| Champms: | Marcelo Ríos[1] |
| Champws: | Martina Hingis |
| Champmd: |  Jonas Björkman /  Patrick Rafter[2] |
| Champwd: |  Lindsay Davenport /  Natasha Zvereva |
The 1998 Newsweek Champions Cup and the State Farm Evert Cup were tennis tournaments played on outdoor hard courts. It was the 25th edition of the Indian Wells Masters and was part of the Super 9 of the 1998 ATP Tour and of Tier I of the 1998 WTA Tour. Both the men's and women's tournaments took place at the Grand Champions Resort in Indian Wells, California in the United States from March 5 through March 15, 1998.
See main article: 1998 Newsweek Champions Cup – Singles. Marcelo Ríos defeated 
Greg Rusedski 6–3, 6–7(15–17), 7–6(7–4), 6–4
See main article: 1998 State Farm Evert Cup – Singles. Martina Hingis defeated Lindsay Davenport 6–3, 6–4
See main article: 1998 Newsweek Champions Cup – Doubles. Jonas Björkman / Patrick Rafter defeated Todd Martin / Richey Reneberg 6–4, 7–6
See main article: 1998 State Farm Evert Cup – Doubles. Lindsay Davenport / Natasha Zvereva defeated 
Alexandra Fusai / Nathalie Tauziat 6–4, 2–6, 6–4