Plentuisa vendia is a species of land snail in the family Hygromiidae, the hairy snails and their allies. It is endemic to Spain.
This snail is known only from the Picos de Europa range in northern Spain. It has been found at only three locations. There it lives in open, rocky habitat, taking shelter in crevices and under plants. Its entire range is within Picos de Europa National Park, where it receives some protection.