1985 500cc Grand Prix leading entries:
| no. | rider | entrant | bike |
| 1 | Eddie Lawson USA | Marlboro Team Agostini | Yamaha OW81 |
| 3 | Raymond Roche FRA | Marlboro Team Agostini | Yamaha OW81 |
| 26 | Tadahiko Taira JAP* | Marlboro Team Agostini | Yamaha YZR |
| 2 | Randy Mamola USA | Rothmans Honda/Mamola | Honda NS / NSR |
| 4 | Freddie Spencer USA | Rothmans Honda/HRC | Honda NSR |
| 5 | Ron Haslam ENG | Rothmans Honda Britain | Honda NS |
| 7 | Wayne Gardner AUS | Rothmans Honda Britain | Honda NS / NSR |
| 22 | Roger Burnett ENG* | Rothmans Honda Britain | Honda RS |
| 51 | Roger Marshall ENG* | Rothmans Honda Britain | Honda RS |
| 6 | Christian Sarron FRA | Team Gauloises Yamaha | Yamaha OW81 |
| 8 | Boet van Dulmen NED | Shell-Toshiba Racing Team | Honda RS |
| 9 | Didier de Radiguès BEL | Team Honda Benelux-Elf | Honda NS |
| 57 | Pierre-Etienne Samin FRA*# | Team Honda Benelux-Elf | Honda RS |
| 34 | Christian le Liard FRA# | Team Elf c/o ROC | Honda NS / Elf 2 |
| 10 | Virginio Ferrari ITA* | Cagiva | Cagiva |
| 58 | Marco Lucchinelli ITA*# | Cagiva | Cagiva |
| 12 | Thierry Espié FRA | Chevallier | Chevallier-Honda |
| 13 | Franco Uncini ITA | HB Suzuki GP Team | Suzuki RG |
| 30 | Sito Pons ESP | HB Suzuki GP Team | Suzuki RG |
| 14 | Takazumi Katayama JAP** | Racing Team Katayama | Bakker-Honda |
| 19 | Rob McElnea ENG# | Skoal Bandit Heron Suzuki | Suzuki RG |
| 55 | Paul Lewis AUS*# | Skoal Bandit Heron Suzuki | Suzuki |
| 20 | Eero Hyvärinen FIN | Honda RS | |
| 21 | Gary Lingham ENG | Myers Motorcycles | Suzuki |
| 27 | Massimo Broccoli ITA | Suzuki / Paton | |
| 28 | Gustav Reiner BRD | Zwafink + Wilbers Racing | Bakker-Honda |
| 29 | Keith Huewen ENG | SDC Builders | Honda |
| 32 | Fabio Biliotti ITA# | Team Italia | Honda RS |
| 42 | Armando Errico ITA# | Team Italia | Honda RS |
| 57 | Massimo Messere ITA# | Team Italia | Honda |
| 33 | Mike Baldwin USA# | Michael Baldwin Racing | Honda RS/NS |
| 33 | Simon Buckmaster ENG# | Sid Griffiths Racing/Duckhams | Suzuki |
| 41 | Marco Papa ITA# | Team Arnetoli | Suzuki / Paton |
| 42 | Dave Petersen ZIM# | Kreepy Krauly Racing Team | Honda RS |
| 46 | Karl Truchsess AUT# | DAF Trucks | Honda |
| 47 | Wolfgang von Muralt SUI# | Frankonia Suzuki | Suzuki RGB |
| 52 | Rob Punt NED# | Nimag/Oud Bier | Suzuki |
| 53 | Henk van der Mark NED# | Stichting Nederlands Racing Team | Honda RS |
| 54 | Mile Pajic NED* | Stichting Nederlands Racing Team | Honda RS |
| 60 | Neil Robinson NIR# | Jim Finlay Racing | Suzuki |
| Andreas Leuthe LUX | Suzuki |
* selected races only
** did not race full season
# Samin also raced number 63
# le Liard also raced numbers 39, 32, 31, 36, 44, 53, 45, 40 and 33
# Lucchinelli also raced number 43
# McElnea also raced number 33
# Lewis also raced number 25
# Biliotti also raced numbers 31, 34 and 16
# Errico also raced numbers 38, 39 and 31
# Messere also raced numbers 51, 36, 50, 48 and 32
# Baldwin also raced numbers 31, 18 and 11
# Buckmaster also raced numbers 36 and 43
# Papa also raced number 38
# Petersen also raced numbers 54, 49, 38, 33 and 32
# Truchsess also raced number 62
# von Muralt also raced numbers 52 and 34
# Punt also raced numbers 56 and 37
# van der Mark also raced number 43
# Robinson also raced number 59
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