The 2013 FIM Moto2 World Championship was the intermediate class of the 65th Fédération Internationale de Motocyclisme (FIM) Road Racing World Championship season. Marc Márquez was the reigning champion, but did not contest in season as he joined MotoGP with Repsol Honda.

Pol Espargaró became champion in the class, after overhauling Scott Redding towards the end of the season. With six race victories, Espargaró won the championship by 40 points ahead of Redding, who won three races, with third place going to Esteve Rabat, a three-time race winner. Nicolás Terol, who finished seventh, was another three-time race winner, with other victories taken by Mika Kallio (fourth) and Jordi Torres, who was tenth in the championship. In the constructors' championship, Kalex won thirteen of the seventeen races to win the title by almost 100 points from Suter, who won the other four races.

The following Grands Prix were scheduled to take place in 2013:

The Fédération Internationale de Motocyclisme released a 18-race provisional calendar on 19 September 2012. On 23 November 2012, the calendar was updated following confirmation that the return of the Argentine Grand Prix would be postponed to 2014. The Grand Prix of the Americas held at the Circuit of the Americas in Austin, United States, replaced the Portuguese Grand Prix, which had been run at Estoril since 2000. The United States hosted two races, the other being the Indianapolis Grand Prix at the Indianapolis Motor Speedway.

Points were awarded to the top fifteen finishers. A rider had to finish the race to earn points.

Each constructor received the same number of points as their best placed rider in each race.