Chrysolina grossa, the red leaf beetle, is a species of broad-shouldered leaf beetles belonging to the family Chrysomelidae, subfamily Chrysomelinae.
Species within this genus include:
This species is mainly found in France, Italy, Spain and former Yugoslavia.
Chrysolina grossa can reach a length of about . 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.