IROC XXII was the twenty-second season of the International Race of Champions, which started on February 13, 1998. The series used identically prepared Pontiac Firebird Trans Am race cars, and contested races at Daytona International Speedway1, California Speedway, Michigan International Speedway, and Indianapolis Motor Speedway. Mark Martin won $225,000 and the IROC championship, his third straight win and fourth in five seasons.
The roster of drivers and final points standings were as follows:
| Position | Driver | Points | Winnings | Series |
|---|---|---|---|---|
| 1 |  Mark Martin |
86 | $225,000 | NASCAR Winston Cup |
| 2 | Jeff Burton |
57 | $100,000 | NASCAR Winston Cup |
| 3 | Jeff Gordon |
51 | $60,000 | NASCAR Winston Cup |
| 4 | Al Unser Jr. |
46 | $50,000 | CART World Series |
| 5 | Terry Labonte |
39 | $45,000 | NASCAR Winston Cup |
| 6 | Tony Stewart |
37 | $40,000 | Indy Racing League |
| 7 | Dale Earnhardt |
36 | $40,000 | NASCAR Winston Cup |
| 8 | Jimmy Vasser |
34 | $40,000 | CART World Series |
| 9 | Randy LaJoie |
31 | $40,000 | NASCAR Busch Series |
| 10 | Dale Jarrett |
29 | $40,000 | NASCAR Winston Cup |
| 11 | Tommy Kendall |
28 | $40,000 | SCCA Trans-Am Series |
| 12 |  Arie Luyendyk |
26 | $40,000 | Indy Racing League |