| 0 | Norm Smith | Lola T70 Mk.2 Chevrolet | Reagan for Governor Committee | |
| 1 | Mario Andretti | Lola T70 Mk.2 Ford | John W. Mecom Jr. | |
| 2 | Richie Ginther | Mirage Mark I A Oldsmobile | Jack Nethercutt | |
| 3 | Graham Hill | Lola T70 Mk.2 Chevrolet | Team Surtees Ltd. | |
| 4 | Bruce McLaren | McLaren Elva Mark IIB Chevrolet | Bruce McLaren Motor Racing Ltd. | |
| 5 | Chris Amon | McLaren Elva Mark IIB Chevrolet | Bruce McLaren Motor Racing Ltd. | |
| 6 | Mark Donohue | Lola T70 Mk.2 Chevrolet | Roger Penske Racing Enterprises | |
| 7 | John Surtees | Lola T70 Mk.2 Chevrolet | Team Surtees Ltd. | |
| 8 | Denny Hulme | Lola T70 Mk.2 Chevrolet | Sidney Taylor | |
| 10 | Chuck Parsons | McLaren Elva Mark II Chevrolet | Hilton Racing Team | |
| 11 | Bob Bondurant | Genie Mk X B Chevrolet | Huffaken Automotive Engineering | |
| 12 | Bob Challman | Cherokee Mk I Ford | Ecurie Shirley Corp. | |
| 14 | Allan Taylor | Lotus 19 Oldsmobile | Specialty Automotive | |
| 15 | Bob Montana | McKee Mk V Plymouth | Bob Montana | |
| 16 | George Follmer | Lola T70 Mk.2 Chevrolet | George Follmer Enterprises | |
| 17 | Don Peckham | Shelby Cobra 427 Ford | Don Peckham | |
| 18 | Peter Lerch | McLaren Elva Mark II Chevrolet | Lynx Racing | |
| 21 | Jerry Titus | Piper - Buick | Laszlo A. Muhl | |
| 22 | Jerry Entin | McLaren Elva Mark I Oldsmobile | Entin Bros. Racing Team | |
| 24 | Pedro Rodriguez | Ferrari Dino 206 S | Modern Classic Motors | |
| 27 | Mike Fisher | Porsche 906 | Rapido Inc.-E. M. Chiles | |
| 28 | André Gessner | Capello SX I Chevrolet | Beach City Chevrolet | |
| 29 | Steve Diulo | Lotus 19G Ford | Steve Diulo | |
| 30 | Dan Gurney | Lola T70 Mk.2 Ford | All American Racers | |
| 31 | Dave Jordan | Lola T70 Ford | Haskell Automotive | |
| 33 | Sam Posey | McLaren Elva Mark II Ford | Autodynamics Corporation | |
| 41 | Dino Dioguardi | Lotus 23 Ford | Dio Bros. Sports Car Center | |
| 43 | Jackie Stewart | Lola T70 Mk.2 Chevrolet | John W. Mecom Jr. | |
| 44 | Al Whatley | Ford GT40 | Alfred T. Whatley | |
| 47 | Joe Ward | Bobsy SR3 Alfa Romeo | Joe Ward | |
| 55 | Jim Adams | McLaren Elva Mark II Ford | Hollywood Sport Cars | |
| 56 | Dick Guldstrand | PAM GP7 Ford | Masterson Racing Enterprises | |
| 58 | Andy Porterfield | Chevrolet Special 283 Corvette | Bill Thomas-Nickey Hi-Performance Parts | |
| 60 | Don Wester | Porsche 906 | Porsche Car Pacific, Inc. | |
| 62 | John Cannon | McLaren Elva Mark II Chevrolet | Gun Motor Racing, Ltd. | |
| 63 | Roy Kumnick | Hamill SR3 Chevrolet | Tero-Corvette | |
| 65 | Phil Hill | Chaparral 2E Chevrolet | Chaparral Cars | |
| 66 | Jim Hall | Chaparral 2E Chevrolet | Chaparral Cars | |
| 67 | Tom Tobin | Brabham BT8 Oldsmobile | Thomas M. Tobin | |
| 68 | Charles Kulmann | Lotus 23B | Charles Kulmann | |
| 70 | Don Jensen | Burnett Mk II Ford | Don L. Jensen | |
| 75 | Miles Gupton | Platypus - Oldsmobile | Miles Gupton | |
| 77 | Mak Kronn | McKee Mk.6 Chevrolet | John W. Fritsch | |
| 81 | Jerry Grant | Lola T70 Mk.2 Chevrolet | Alan Green Chevrolet | |
| 86 | Mike Goth | McLaren Goth Special Chevrolet | Mike Goth Racing | |
| 91 | Scott / Hulme | McLaren Elva Mark II Ford | Drummond Racing Organization | |
| 92 | Bob Bucher | Lola T70 Mk.2 Ford | Young-B.A.R.F., Inc. Racing Team | |
| 93 | Nelson Sweetser | Merlyn Mk VI Ford | Sweetser-Robinson Enterprises | |
| 95 | | Nickey Vinegaroon Mk II Oldsmobile | Dan Blocker Motor Racing | |
| 96 | Lothar Motschenbacher | McLaren Elva Mark II Chevrolet | Dan Blocker Motor Racing | |
| 97 | Charlie Hayes | McLaren Elva Mark II Chevrolet | Charles Hayes Racing | |