The 1957 Motocross World Championship was the 1st edition of the Motocross World Championship organized by the FIM and reserved for 500cc motorcycles.

The 250cc class, introduced this season, will also dispute five running-in seasons, from 1957 to 1961, a period in which it will take on the name of the European Cup, to become World Championship as well starting from the 1962 season.

[1] From May 5 to August 25 the 500cc class held 9 grands prix which awarded points to the first six classified competitors, respectively: 8, 6, 4, 3, 2, 1.

The score in the final classification of each competitor was calculated on the best four results.

[2] Points are awarded to the top 6 classified finishers.