Georissa is a genus of minute land snails, terrestrial gastropod mollusks in the family Hydrocenidae.

One species, Georissa filiasaulae, is cavernicolous.

It is only known from two caves in the Sepulut area of Sabah, Malaysian Borneo, where its above-ground sister species, Georissa saulae, inhabits the rocks outside of the cave, and is connected to the cave snail via narrow zones of hybridization at the cave entrances.

Possibly, G. filiasaulae has evolved without ever having been fully separated from its ancestor, a process known as speciation-with-gene-flow.

[2][3] Species within the genus Georissa include: This Neritimorpha-related article is a stub.