The FIM Motocross World Championship is the premier championship of motocross racing, organized by the Fédération Internationale de Motocyclisme (FIM), divided into two distinct classes: MXGP and MX2.

changed the displacement formulas to reflect the changes in engine technology and as a move towards environmentally friendlier four-stroke engines.

[1] The MX2 class allowed two-stroke engines of up to 125cc and four-stroke motors of up to 250cc.

Countries that have held Grand Prix as of the 2024 season.

Countries in bold currently hold a Grand Prix.