The 2014 Grand Prix motorcycle racing season was the 66th Road Racing World Championship season. Marc Márquez started the season as the defending riders' champion in the MotoGP category, with Honda the defending manufacturers' champions. Pol Espargaró and Maverick Viñales were the reigning Moto2 and Moto3 champions respectively; however, neither defended their titles as both riders moved up a class, with Espargaró joining MotoGP and Viñales entering Moto2.
Winning a premier class record 13 races during the season, Márquez won a second successive title, finishing 67 points clear of his nearest rival Valentino Rossi. Márquez won each of the first 10 races to be held in 2014, before Repsol Honda team-mate Dani Pedrosa was able to inflict his first defeat, at Brno. Rossi had taken eight podiums in the season, before he was able to win a race, when he won at Misano. He also won at Phillip Island, as he finished as the championship runner-up in a Grand Prix class for the first time since 2006, when he finished second to Nicky Hayden. Despite bookending his season with retirements, Rossi's Movistar Yamaha MotoGP team-mate Jorge Lorenzo finished third in the championship. Finishing 32 points behind Rossi, Lorenzo took back-to-back victories in Aragon, and Japan, as part of a nine-race podium streak that was ended by his retirement in Valencia. The only other race winner was Pedrosa, with his Brno triumph being his sole victory in the 2014 campaign.