| series | Champcar complete |
| race | DuQuoin |
| year | 1966 |
| team | car | entry | driver | start | finish | chassis | engine | laps led | * | |
| Federal Engineering | 22 | Federal Engineering | Bud Tingelstad | | 12 | 1 | Meskowski 64 D [12] | Offy 252 | 11 | |
| Agajanian | 98 | Agajanian REV 500 | Dick Atkins | | 9 | 2 | Watson 64 D [5] | Offy 252 | ||
| W & W Enterprises | 5 | Weinberger Homes | Bobby Unser | | 1 | 3 | Blum 62 D [2] | Offy 252 | 23 | |
| Gordon Van Liew | 7 | Vita Fresh | Joe Leonard | | 14 | 4 | Meskowski 63 D [10] | Offy 252 | ||
| Walter Flynn | 35 | Enterprise Machine | Ralph Liguori | | 13 | 5 | Flynn 64 D [1] | Offy 252 | ||
| Leader Card | 4 | Leader Card | Don Branson | | 3 | 6 | Watson 59 D [3] | Offy 252 | ||
| AJ Foyt | 2 | Sheraton-Thompson | AJ Foyt | | 4 | 7 | Meskowski 63 D [11] | Offy 252 | ||
| Ken Brenn | 24 | Ken Brenn | Larry Dickson | | 15 | 8 | Meskowski 62 D [9] | Offy 252 | ||
| Dayton-Walther | 77 | Dayton-Walther | Billy Foster | | 16 | 9 | Meskowski 59 D [2] | Offy 252 | ||
| John Zink | 3 | Zink-Urschel-Slick | Jim McElreath | | 8 | 10 | Moore 65 D [1] | Offy 252 | ||
| Peter Salemi | 81 | Central Excavating | Arnie Knepper | | 7 | 11 | Dunlop 64 D [1] | Offy 252 | 65 | |
| Vatis Enterprises | 53 | Vatis Enterprises | Gary Congdon | | 10 | 12 | Vollstedt 59 D [5] | Offy 252 | ||
| Gehlhausen | 84 | Midwest Manufacturing | Bob Tattersall | | 17 | 13 | Kurtis 4000 D [343-51] | Offy 252 | ||
| Lyle Hyneman | 42 | Lyle Hyneman | Al Miller | | 18 | 14 | Kuzma 60 D [10] | Offy 252 | ||
| Dean Racing | 1 | Dean Van Lines | Mario Andretti | | 5 | 15 | Kuzma 60 D [9] | Offy 252 | ||
| Leader Card | 12 | Wynn's | Chuck Hulse | | 6 | 16 | Watson 62 D [4] | Offy 252 | ||
| Mel Nelson | 58 | Mel Nelson | Carl Williams | | 11 | 17 | Kuzma 60 D [11] | Offy 252 | ||
| Lindsey Hopkins | 8 | G.C. Murphy | Roger McCluskey | | 2 | 18 | Meskowski 61 D [6] | Offy 252 | 1 | |
| Jake Vargo | 52 | Vargo Excavating | Bud Randall | | DNS | Meskowski 59 D [3] | Offy 252 | |||
| Seymour & Deakin | 20 | S&D | George Snider | | DNS | Meskowski 61 D [7] | Chevy 305 V8 | |||
| Stahl Brothers | 36 | Stahl Brothers | Ray Duckworth | | DNS | Kuzma 58 D [8] | Chevy 305 V8 |
