The 2023 FIM Motocross World Championship was the 67th FIM Motocross World Championship season.[1]
In the MXGP class, Tim Gajser started the season as the reigning champion after picking up his fifth world title in 2022. The reigning MX2 world champion, Tom Vialle, did not defend his title as he moved to the United States to compete in the AMA Supercross and AMA Motocross championships.[2]