Acrididea including the Acridomorpha[3] is an infraorder of insects that describe the grasshoppers (thus also locusts) and ground-hoppers.

It contains a large majority of species in the suborder Caelifera and the taxon Acridomorpha may also be used, which excludes the Tetrigoidea.

[4] Both names are derived from older texts, such as Imms,[5] which placed the "short-horned grasshoppers" and locusts at the family level (Acrididae).

The study of grasshopper species is called acridology.

The Orthoptera Species File lists the following superfamilies: most families and species belong to the Acridoidea.