| 1 | Tommy Hitchcock | Thomas Hitchcock (USA) | Tommy Hitchcock | Brabham | BT8 | | Climax | U2L |
| 2 | Bruce McLaren | Bruce McLaren Motor Racing Ltd. | | McLaren | Elva Mark I | | Oldsmobile | O2L |
| 3 | Frank Gardner | Team Elite ('62) Ltd. (GB) | | Brabham | BT8 | | Climax | U2L |
| 4 | Jack Brabham | Ecurie Vitesse S.A., Geneva, Switz. | | Brabham | BT8 | | | O2L |
| 5 | Skip Hudson | Nickey Chevrolet (USA) | | Cooper | Monaco | T61M | Chevrolet | O2L |
| 6 | Roger Penske | Chaparral Cars (USA) | | Chaparral | 2A | | Chevrolet | O2L |
| 7 | Hugh Dibley | Stirling Moss Automobile Racing Team (GB) | Stirling Moss | Brabham | BT8 | | Climax | U2L |
| 8 | Jerry Grant | Alan Green Chevrolet, Inc. | | Lotus | 19 | B | Chevrolet | O2L |
| 10 | Innes Ireland | Rosebud Racing - Tom O'Connor, Jr. | | Lotus | 19 | | Ferrari | O2L |
| 11 | Robs Lamplough | Robert Lamplough (GB) | | Brabham | BT8 | | Climax | U2L |
| 12 | George Wintersteen | Bernice Mc I. Wintersteen (USA) | | Cooper | Monaco | T61M | Chevrolet | O2L |
| 14 | Tony Settember | Webster Racing Enterprises (USA) | Marvin Webster | Webster | 2 Litre | | | U2L |
| 15 | Jim Clark | Colin Chapman Team Lotus (GB) | | Lotus | 30 | | Ford | O2L |
| 16 | George Follmer | Trans Ocean Motors (USA) | | Lotus | 23 | B | Porsche | U2L |
| 19 | Dan Gurney | Pacesetter Homes (USA) | | Lotus | 19 | B | Ford | O2L |
| 21 | | Bob Challman - Ecurie Shirlee | | Lotus | 30 | | Ford | O2L |
| 22 | Bob Challman | Bob Challman - Ecurie Shitlee (USA) | | Lotus | 23 | B | Ford | U2L |
| 23 | A. J. Foyt | John Mecom, Jr. (USA) | John Mecom, Jr. | Hussein | 1 | | Dodge | O2L |
| 24 | Augie Pabst | John Mecom, Jr. (USA) | John Mecom | Lola | Mk.6 GT | | Chevrolet | O2L |
| 25 | Augie Pabst | John Mecom, Jr. (USA) | John Mecom, Jr. | Genie | Mk X | | Chevrolet | O2L |
| 26 | Walt Hansgen | John Mecom, Jr. (USA) | John Mecom, Jr. | Scarab | Mk IV | | Chevrolet | O2L |
| 33 | Mike Jones | Clarence Dixon Cadillac, Inc. (USA) | | Cheetah | GT | | Chevrolet | O2L |
| 39 | Charles Cox | Charles C. Cox (USA) | Charles Cox | Cooper | King Cobra | | Ford | O2L |
| 51 | | | | | | | | |
| 60 | Don Wester | Don Webster Enterprises (USA) | | Genie | Mk X | B | Ford | O2L |
| 61 | Paul Reinhart | Paul Reinhart (USA) | Paul Reinhart | Genie | Mk VIII | | Chevrolet | O2L |
| 66 | Hap Sharp | Chaparral Cars (USA) | | Chaparral | 2A | | Chevrolet | O2L |
| 69 | Al Unser | Arciero Bros. Racing (USA) | | Lotus | 23 | B | | U2L |
| 75 | Miles Gupton | Hans-Adam - P.A.M. (USA) | | Platypus | | | Porsche | U2L |
| 77 | John Cannon | Oliver C. Schmidt | | Elva | Mk VII | | Porsche | U2L |
| 81 | Allen Grant | Alan Green Chevrolet (USA) | | Cheetah | GT | | Chevrolet | O2L |
| 90 | George Koehne | George H. Koehne, Jr. (USA) | | Genie | Mk X | | Chevrolet | O2L |
| 91 | Bob Johnson | Shelby American, Inc. (USA) | | McKee | Mk III | | Ford | O2L |
| 92 | Richie Ginther | Shelby American, Inc. (USA) | | Cooper | King Cobra | | Ford | O2L |
| 93 | Bob Bondurant | Shelby American, Inc. (USA) | | Cooper | King Cobra | | Ford | O2L |
| 94 | Parnelli Jones | Shelby American, Inc. (USA) | | Cooper | King Cobra | | Ford | O2L |
| 95 | Ronnie Bucknum | Shelby American, Inc. (USA) | | Cooper | King Cobra | | Ford | O2L |
| 96 | Bobby Unser | Arciero Bros. Racing (USA) | Frank Arciero | Lotus | 19 | Monte Carlo | Chevrolet | O2L |
| 97 | Ed Leslie | Shelby American, Inc. (USA) | | Cooper | Monaco | Lang II | Ford | O2L |
| 98 | Ken Miles | Shelby American, Inc. (USA) | | Shelby | Cobra | roadster | Ford | O2L |
| 99 | John Morton | Shelby American, Inc. (USA) | Carroll Shelby | Lotus | 23 | B | | U2L |
| 111 | Rick Muther | Rick Muther (USA) | | Lotus | 23 | B | Ford | U2L |
| 146 | Dave Ridenour | Jim Wessman (USA) | Dave Ridenour | Genie | Mk VIII | | Mercury | O2L |
| 177 | Bill Wuesthoff | Robert Bosch Spark Plug Special (USA) | Edward Weschler, Jr. | Elva | Mk VII | S | Porsche | U2L |
| Bill Krause | | | Lotus | 23 | B | Ford | U2L |
| Ed Cantrell | | | Cooper | Monaco | | Ford | O2L |
| Jim Parkinson | | | Cooper | | | Chevrolet | O2L |
| Mike Spence | Colin Chapman Team Lotus (GB) | | Lotus | 30 | | Ford | O2L |