Chrysolina grossa, the red leaf beetle, is a species of broad-shouldered leaf beetles belonging to the family Chrysomelidae, subfamily Chrysomelinae.

[2] Chrysolina grossa can reach a length of about 10 millimetres (0.39 in).

Head and pronotum show metallic blue-green colours, while elytra are bright red.

It can be distinguished from Chrysomela populi for its longer antennae and wider pronotum.

It feeds on wild plants of the Lamiaceae species.