The 2018 Grand Prix motorcycle racing season is the 70th F.I.M. Road Racing World Championship season. Marc Márquez entered the season as the reigning champion, with Repsol Honda being the reigning team champions and Honda the reigning constructors' champions.
After nine rounds of the championship, Marc Márquez holds the championship lead, after winning three consecutive races during spring and four overall. Valentino Rossi is in second and Maverick Viñales in third, neither of whom have won a race. Andrea Dovizioso, Cal Crutchlow and Jorge Lorenzo were the other race winners.