List of Grand Prix motorcycle racing World Riders' Champions

[1] The Grand Prix Road-Racing World Championship was established in 1949 by the sport's governing body, the Fédération Internationale de Motocyclisme (FIM), and is the oldest motorsport World Championship.

[5] MotoE was introduced in 2019 as a "World Cup" until 2022 and thus statistics from that time span is not included here.

Giacomo Agostini, with 15 victories, has won the most world championships.

[7] Agostini holds the record for the most victories in the 500cc/MotoGP and 350cc classes with eight and seven world championships respectively.

Phil Read and Max Biaggi have won the most 250cc/Moto2 championships, with four victories each.

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Giacomo Agostini , who won 15 motorcycle world championships