Crickets, family Gryllidae, are insects somewhat related to grasshoppers and more closely related to katydids or bush crickets (family Tettigoniidae). They have somewhat flattened bodies and long antennae. There are about 900 species of crickets. They tend to be nocturnal and are often confused with grasshoppers because they have a similar body structure including jumping hind legs.

Crickets are harmless to humans, as crickets are not aggressive toward humans and rarely attack.

Crickets are a favorite insect of children to collect in areas of the world they populate.