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Official Box Score
50th Indianapolis 500-Mile Race at the Indianapolis Motor Speedway
Monday, May 30, 1966
| FP | SP | Car # | Driver | Car Name | Chassis/Engine | Laps | Status | Prize Money | |
| 1 | 15 | 24 | R | Graham Hill | American Red Ball | Lola/Ford | 200 | 144.317 | $156,297 |
| 2 | 2 | 19 | W | Jim Clark | STP Gas Treatment | Lotus/Ford | 200 | 143.843 | $76,992 |
| 3 | 7 | 3 | Jim McElreath | Zink-Urschel-Slick | Brabham/Ford | 200 | 143.742 | $42,586 | |
| 4 | 6 | 72 | Gordon Johncock | Weinberger Homes | Gerhardt/Ford | 200 | 143.084 | $26,381 | |
| 5 | 17 | 94 | R | Mel Kenyon | Gerhardt | Gerhardt/Offy | 198 | Running | $21,987 |
| 6 | 11 | 43 | R | Jackie Stewart | Bowes Seal Fast | Lola/Ford | 190 | Oil pressure | $25,767 |
| 7 | 29 | 54 | Eddie Johnson | Valvoline II | Huffaker/Offy | 175 | Stalled | $17,615 | |
| 8 | 28 | 11 | Bobby Unser | Vita Fresh Orange Juice | Huffaker/Offy | 171 | Running | $16,562 | |
| 9 | 20 | 6 | Joe Leonard | Yamaha Eagle | Eagle/Ford | 170 | Stalled | $15,822 | |
| 10 | 10 | 88 | Jerry Grant | Bardahl-Pacesetter Homes | Eagle/Ford | 167 | Running | $15,055 | |
| 11 | 5 | 14 | Lloyd Ruby | Bardahl Eagle | Eagle/Ford | 166 | Cam | $24,926 | |
| 12 | 23 | 18 | Al Unser | STP Oil Treatment | Lotus/Ford | 161 | Accident | $14,965 | |
| 13 | 21 | 8 | Roger McCluskey | G.C. Murphy | Eagle/Ford | 129 | Oil leak | $13,123 | |
| 14 | 4 | 98 | W | Parnelli Jones | Agajanian's Rev 500 | Shrike/Offy | 87 | Wheel bearing | $13,462 |
| 15 | 13 | 26 | W | Rodger Ward | Bryant Heating & Cooling | Lola/Offy | 74 | Handling | $11,857 |
| 16 | 25 | 77 | R | Carl Williams | Dayton Steel Wheel | Gerhardt/Ford | 38 | Valve, oil | $12,171 |
| 17 | 22 | 56 | Jim Hurtubise | Gerhardt | Gerhardt/Offy | 29 | Oil | $11,604 | |
| 18 | 1 | 1 | Mario Andretti | Dean Van Lines | Brawner/Ford | 27 | Valve | $25,121 | |
| 19 | 3 | 82 | George Snider | Sheraton-Thompson | Coyote/Ford | 22 | Accident | $12,075 | |
| 20 | 8 | 12 | Chuck Hulse | Wynn's | Watson/Ford | 22 | Accident | $10,463 | |
| 21 | 27 | 22 | Bud Tingelstad | Federal Engineering | Gerhardt/Offy | 16 | Overheating | $10,470 | |
| 22 | 14 | 28 | Johnny Boyd | Prestone | B.R.P./Ford | 5 | Accident | $9,896 | |
| 23 | 9 | 4 | Don Branson | Leader Cards Racer | Gerhardt/Ford | 0 | Accident | $9,791 | |
| 24 | 12 | 27 | Billy Foster | Jim Robbins | Vollstedt/Ford | 0 | Accident | $9,554 | |
| 25 | 16 | 53 | R | Gary Congdon | Valvoline | Huffaker/Offy | 0 | Accident | $9,386 |
| 26 | 18 | 2 | W | A.J. Foyt | Sheraton-Thompson | Lotus/Ford | 0 | Accident | $10,887 |
| 27 | 19 | 31 | Dan Gurney | All American Racers | Eagle/Ford | 0 | Accident | $9,806 | |
| 28 | 24 | 66 | R | Cale Yarborough | Jim Robbins | Vollstedt/Ford | 0 | Accident | $9,794 |
| 29 | 26 | 37 | Arnie Knepper | Sam Liosi | Cecil/Ford | 0 | Accident | $9,301 | |
| 30 | 30 | 75 | Al Miller (Krulac) | Jerry Alderman Ford | Lotus/Ford | 0 | Accident | $8,876 | |
| 31 | 31 | 39 | Bobby Grim | Racing Associates | Watson/Offy | 0 | Accident | $8,720 | |
| 32 | 32 | 34 | R | Larry Dickson | Michner Petroleum | Lola/Ford | 0 | Accident | $9,933 |
| 33 | 33 | 96 | Ronnie Duman | Harrison | Eisert/Ford | 0 | Accident | $9,564 | |
| - | - | - | Other Awards | $ 999 | |||||
| Total Purse: $ 691,808 | |||||||||
Time of Race: 3:27:52.53 Average Speed: 144.317 Margin of Victory: 41.13 sec.
Pole: #1 Mario Andretti (165.899, 3:37.00) Fastest Race Lap: #19 Jimmy Clark (Race Lap 18, 159.179 mph, 56.54 sec.)
Winning Car Owner: John Mecom, Jr. Winning Chief Mechanic George Bignotti Winning Tire: Firestone
Rookie of the Year: Jackie Stewart
Legend: R=Indianapolis 500-Mile Race Rookie; W=Indianapolis 500-Mile Race Former Winner;
Lap Leaders:
Andretti 1-16, Clark 17-64, Ruby 65-75, Clark 76-86, Ruby 87-132, Clark 133-139, Ruby 140-150, Stewart 151-190, Hill 191-200
Lap Leader Summary:
Andretti 1 for 16 laps, Clark 3 for 66 laps, Ruby 3 for 68 laps, Stewart 1 for 40 laps, Hill 1 for 10 laps .
Lead Changes: 8 among 5 drivers.
Caution Laps:
Cautions: 0 for 0 laps.
