1988 500cc Grand Prix leading entries:
| no. | rider | entrant | bike |
| 1 | Wayne Gardner AUS | Rothmans Honda/HRC | Honda NSR |
| 9 | Shunji Yatsushiro JAP | Rothmans Honda/HRC | Honda NSR |
| 9 | Roger Burnett ENG*# | Rothmans Honda/HRC | Honda NSR |
| 2 | Randy Mamola USA | Cagiva Corse Srl | Cagiva C588 |
| 21 | Raymond Roche FRA | Cagiva Corse Srl | Cagiva C588 |
| 29 | Massimo Broccoli ITA**# | Cagiva Corse Srl | Cagiva |
| 3 | Eddie Lawson USA | Marlboro Yamaha Team Agostini | Yamaha YZR |
| 12 | Didier de Radiguès BEL | Marlboro Yamaha Team Agostini | Yamaha YZR |
| 4 | Ron Haslam ENG | Team Elf-ROC | Elf 5-Honda |
| Mal Campbell AUS** | Team Elf-ROC | Elf 5-Honda | |
| 5 | Niall Mackenzie SCO | HB-Honda Racing Corporation | Honda NSR |
| 6 | Tadahiko Taira JAP | Yamaha Racing Team | Yamaha YZR |
| 54 | Norihiko Fujiwara JAP** | Yamaha Racing Team | Yamaha YZR |
| 7 | Christian Sarron FRA | Team Gauloises Blondes Yamaha Mobil 1 | Yamaha YZR |
| 14 | Patrick Igoa FRA | Team Gauloises Blondes Yamaha Mobil 1 | Yamaha YZR |
| 8 | Pier-Francesco Chili ITA | HB Honda Gallina Team | Honda NSR |
| Roger Burnett ENG** | Racing Team Katayama | Honda RS | |
| 18 | Mike Baldwin USA*** | Racing Team Katayama | Honda RS |
| 31 | Fabio Barchitta RSM# | Racing Team Katayama | Honda RS |
| 51 | Donnie McLeod SCO***# | Racing Team Katayama | Honda RS |
| F Gonzáles de Nicolás ESP** | Racing Team Katayama | Honda RS | |
| 10 | Rob McElnea ENG | Team Pepsi Suzuki | Suzuki RGV |
| 34 | Kevin Schwantz USA | Team Pepsi Suzuki | Suzuki RGV |
| 16 | Kevin Magee AUS | Team Lucky Strike Roberts | Yamaha YZR |
| 17 | Wayne Rainey USA | Team Lucky Strike Roberts | Yamaha YZR |
| 18 | Mike Baldwin USA** | Honda RS | |
| 20 | Manfred Fischer BRD | Team Hein Gericke | Honda RS |
| 26 | Gustav Reiner BRD**** | Team Hein Gericke | Honda RS |
| 22 | Marco Papa ITA# | Team Greco | Honda RS |
| 23 | Daniel Amatriaín ESP# | Ducados | Honda RS |
| 25 | Marco Gentile SUI | Marlboro Fior Team | Fior-Honda |
| 27 | Alessandro Valesi ITA | Team Iberna | Honda RS |
| 28 | Fabio Biliotti ITA# | Team Amaranto | Paton/Honda |
| 29 | Bruno Kneubühler SUI | Römer Racing Suisse | Honda RS |
| 30 | Niggi Schmassmann SUI | Honda RS | |
| 31 | Steve Manley ENG | Suzuki RG | |
| 39 | Wolfgang von Muralt SUI | Suzuki RG | |
| 40 | Andreas Leuthe LUX | Suzuki RGB | |
| 42 | Larry Moreno Vacondio VEN | Suzuki RGB | |
| 44 | Ari Rämö FIN | Rukka Oy | Honda RS |
| 45 | Hikaru Miyagi JAP** | Honda NSR | |
| 45 | Josef Doppler AUT | Honda RS | |
| 46 | Shin’ichi Itoh JAP** | Seed | Honda NSR |
| 50 | Maarten Duyzers NED# | HDJ International | Honda RS |
| 51 | Rachel Nicotte FRA# | PVI Racing / Jacadi | Honda RS |
| 52 | Eddie Laycock EIR | Millar Racing | Honda RS |
* substitute rider
** wildcard entry at selected races
*** selected races, filming for American Built, aka Race for Glory
**** did not race full season
# Burnett also raced number 11
# Broccoli also raced number 36
# Barchitta also raced numbers 28 and 46
# McLeod also raced number 49
# Papa also raced number 30
# Amatriaín also raced number 28
# Biliotti also raced number 55
# Duyzers also raced number 33
# Nicotte also raced number 32
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