500cc Grand Prix leading entries for 1980
| no. | rider | entrant | bike |
| 1 | Kenny Roberts USA | Yamaha Motor Japan | Yamaha OW48 |
| 2 | Virginio Ferrari ITA*** | Cagiva | Cagiva |
| 3 | Wil Hartog NED# | Riemersma Racing | Suzuki RGB |
| 4 | Johnny Cecotto VEN | Venemotos Racing Team | Yamaha OW48 |
| 5 | Franco Uncini ITA# | Jen Organs ? | Suzuki RG |
| 6 | Boet van Dulmen NED# | Yamaha I.M.N. | Yamaha |
| 14 | Jack Middelburg NED# | Yamaha I.M.N. | Yamaha |
| 7 | Barry Sheene ENG | Team Akai with Texaco | Yamaha TZ / OW |
| 8 | Takazumi Katayama JAP*# | Honda International | Honda NR |
| 19 | Mick Grant ENG***# | Honda International | Honda NR |
| 9 | Philippe Coulon SUI# | Marlboro Frankonia Nava | Suzuki |
| 10 | Marco Lucchinelli ITA# | Team Nava Olio Fiat | Suzuki RGB |
| 28 | Graziano Rossi ITA# | Team Nava Olio Fiat | Suzuki RGB |
| 11 | Kork Ballington RSA**# | Team Kawasaki | Kawasaki KR |
| 20 | Gregg Hansford AUS*** | Team Kawasaki | Kawasaki KR |
| 12 | Patrick Pons FRA+# | Team Sonauto Gauloises GPA | Yamaha |
| 34 | Raymond Roche FRA*** | Team Sonauto Gauloises GPA | Yamaha |
| Christian Sarron FRA*** | Team Sonauto Gauloises GPA | Yamaha | |
| 13 | Michel Frutschi SUI# | Elf Moto Racing Team | Yamaha |
| 14 | Michel Rougerie FRA# | Ecurie Sté Pernod | Suzuki |
| 20 | Patrick Fernandez FRA# | Ecurie Sté Pernod / Sonauto | Yamaha |
| 15 | Randy Mamola USA# | Texaco Heron Team Suzuki | Suzuki RGB |
| 40 | Graeme Crosby NZL# | Texaco Heron Team Suzuki | Suzuki RGB |
| 18 | Sadao Asami JAP# | Yamaha | |
| 26 | Sergio Pellandini SUI# | Suzuki | |
| 27 | Christian Estrosi FRA# | Suzuki | |
| 28 | Bernard Fau FRA# | GME Motul GPA | Suzuki |
| 36 | Maurizio Massimiani ITA | Team Naldoni | Yamaha |
| 40 | Takazumi Katayama JAP*# | Sarome | Suzuki RG |
| 44 | Seppo Rossi FIN# | MAN 2000 ? | Suzuki |
| 45 | Carlo Perugini ITA# | Team Gattino ? | Suzuki |
| 61 | Willem Zoet NED# | Stimorol ? | Suzuki |
* Katayama raced the Suzuki until the Honda was ready
** Ballington missed races through injury
*** did not race full season
# Hartog also raced number 4
# Uncini also raced number 57
# van Dulmen also raced number 43
# Middelburg also raced numbers 8, 9 and 7
# Katayama also raced numbers 17, 14 and 52
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