| Pos |
# |
Driver |
Car |
Time |
| 1 | 16 | Jo Siffert | Lotus 49B Cosworth | 1:45,220 |
| 2 | 6 | Chris Amon | Ferrari 312/68 | 1:45,620 |
| 3 | 10 | Graham Hill | Lotus 49B Cosworth | 1:46,010 |
| 4 | 1 | Denny Hulme | McLaren M7A Cosworth | 1:46,040 |
| 5 | 14 | Dan Gurney | McLaren M7A Cosworth | 1:46,290 |
| 6 | 5 | John Surtees | Honda RA301 | 1:46,490 |
| 7 | 15 | Jackie Stewart | Matra MS10 Cosworth | 1:46,690 |
| 8 | 3 | Jack Brabham | Brabham BT26 Repco | 1:46,800 |
| 9 | 2 | Bruce McLaren | McLaren M7A Cosworth | 1:47,000 |
| 10 | 4 | Jochen Rindt | Brabham BT26 Repco | 1:47,070 |
| 11 | 12 | Moises Solana | Lotus 49B Cosworth | 1:47,670 |
| 12 | 8 | Pedro Rodriguez | BRM P133 | 1:47,800 |
| 13 | 21 | Jean-Pierre Beltoise | Matra MS11 | 1:48,380 |
| 14 | 11 | Jackie Oliver | Lotus 49B Cosworth | 1:48,440 |
| 15 | 7 | Jacky Ickx | Ferrari 312/68 | 1:49,240 |
| 16 | 23 | Johnny Servoz-Gavin | Matra MS10 Cosworth | 1:49,270 |
| 17 | 18 | Vic Elford | Cooper T86B BRM | 1:49,480 |
| 18 | 17 | Jo Bonnier | Honda RA301 | 1:49,960 |
| 19 | 22 | Piers Courage | BRM P126 | 1:50,280 |
| 20 | 9 | Henri Pescarolo | Matra MS11 | 1:50,430 |
| 21 | 19 | Lucien Bianchi | Cooper T86B BRM | 1:50,570 |
|
Grand Prix of Mexico 1968