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The 1998 Supercross World Championship will be held over 4 rounds. The Belgian round, scheduled on December 12 & 13 in Antwerpen, is cancelled. No solution was found to replace the cancelled round of Tokyo.
| Date | Country | City | Venue |
| October 24 | France | Paris | Stade de France |
| October 31 | Brazil | Belo Horizonte | Minelrinho Stadium |
| November 20-21 | Germany | Leipzig | Messe |
| November 28-29 | Italy | Genova | Palasport |
