1983 500cc Grand Prix leading entries:
| no. | rider | entrant | bike |
| 1 | Franco Uncini ITA* | Team HB Suzuki | Suzuki |
| 12 | Boet van Dulmen NED** | Team HB Suzuki | Suzuki |
| 14 | Loris Reggiani ITA* | Team HB Suzuki | Suzuki |
| 3 | Freddie Spencer USA | Honda Racing Company | Honda NS |
| 5 | Marco Lucchinelli ITA | Honda Racing Company | Honda NS |
| 8 | Takazumi Katayama JAP* | Honda Racing Company | Honda NS |
| 9 | Ron Haslam ENG# | Honda Racing Company | Honda NS |
| 4 | Kenny Roberts USA | Yamaha Marlboro | Yamaha OW70 |
| 22 | Carlos Lavado VEN*** | Yamaha Marlboro | Yamaha |
| 27 | Eddie Lawson USA | Yamaha Marlboro | Yamaha OW70 |
| 6 | Randy Mamola USA | Team HB Suzuki | Suzuki XR45 |
| 16 | Anton Mang BRD | Team HB Suzuki | Suzuki |
| 7 | Barry Sheene ENG | Heron Team Suzuki | Suzuki XR40 |
| 25 | Rob McElnea ENG*** | Heron Team Suzuki | Suzuki |
| 47 | Keith Huewen ENG# | Heron Team Suzuki | Suzuki RG |
| 10 | Marc Fontan FRA | Team Sonauto Gauloises | Yamaha |
| 11 | Virginio Ferrari ITA* | Cagiva Motor Italia | Cagiva |
| 20 | Jon Ekerold RSA* | Cagiva Motor Italia | Cagiva |
| 12 | Boet van Dulmen NED | Shell Nederland | Suzuki |
| 14 | Michel Frutschi SUI+ | Honda RS | |
| 15 | Sergio Pellandini SUI | Marlboro-Tissot | Suzuki |
| 17 | Gustav Reiner BRD | Krauter-Vertrieb Racing | Suzuki |
| 18 | Didier de Radiguès BEL* | Team Johnson Elf | Honda RS |
| 19 | Wolfgang von Muralt SUI | Suzuki | |
| 20 | Jon Ekerold RSA* | Suzuki | |
| 23 | Fabio Biliotti ITA | Honda RS | |
| 28 | Giovanni Pelletier ITA | Hirt Giapauto | Honda |
| 30 | Jack Middelburg NED# | Stichting Ned. | Honda |
| 35 | Raymond Roche FRA | Honda RS / NS | |
| 38 | Leandro Becheroni ITA# | Suzuki | |
| 39 | Guido Paci ITA+ | Honda RS | |
| 41 | Philippe Coulon SUI# | Marlboro | Suzuki |
| 43 | Steve Parrish ENG# | Mitsui Yamaha | Yamaha |
| 47 | Roger Marshall ENG*** | Honda Britain Racing | Honda |
| 51 | Wayne Gardner AUS*** | Honda Britain Racing | Honda NS |
| 49 | Chris Guy ENG# | Suzuki | |
| 50 | Peter Sjöstrom SVE# | Jeb’s Helmet Sweden | Suzuki |
| 51 | Ernst Gschwender BRD | Suzuki | |
| 59 | Maurizio Massimiani ITA# | Honda Italia | Honda RS |
| Franz Kaserer AUT | Suzuki | ||
| Borge Nielsen DAN | Suzuki |
* did not race full season
** replacement rider
*** wildcard entry at selected races
+ killed in racing crash
# Haslam also raced numbers 47, 43 and 35
# Huewen also raced numbers 55 and 29
# Middelburg also raced number 22
# Becheroni also raced number 39
# Coulon also raced number 33
# Parrish also raced number 26
# Guy also raced numbers 46 and 13
# Massimiani also raced number 52
# Sjöstrom also raced number 41
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