IROC XXIX was the 29th season of the Crown Royal International Race of Champions, which began on Friday February 12, 2005 at Daytona International Speedway. The all-star roster included twelve drivers from eight premier racing series. Mark Martin dominated the season, winning two races and finishing well ahead in the points standings, earning him a record-setting fifth IROC title. As with IROC XXVIII, the drivers used their car colors and numbers from their native series (when feasible).
| Driver | DAY | TEX | RCH | ATL | Pts | ||
|---|---|---|---|---|---|---|---|
| 1 |  Mark Martin | 1 | 2 | 1 | 2 | 89 | |
| 2 | 2 | 4 | 5 | 1 | 68 | ||
| 3 | Matt Kenseth | 4 | 9 | 3 | 3 | 55 | |
| 4 | 5 | 3 | 4 | 7 | 46 | ||
| 5 |  Sébastien Bourdais | 12 | 1 | 10 | 6 | 46 | |
| 6 | Kurt Busch | 9 | 11 | 2 | 12 | 43 | |
| 7 | Bobby Hamilton | 3 | 5 | 12 | 10 | 34 | |
| 8 | Danny Lasoski | 7 | 7 | 7 | 5 | 34 | |
| 9 |  Hélio Castroneves | 8 | 10 | 11 | 4 | 32 | |
| 10 |  Max Papis | 6 | 6 | 9 | 9 | 30 | |
| 11 | Steve Kinser | 11 | 8 | 8 | 8 | 29 | |
| 12 | Scott Pruett | 10 | 12 | 6 | 11 | 22 |