Viola kauaensis is a rare species of flowering plant in the violet family known by the common names Kauaûi violet and pohe hiwa. It is endemic to Hawaii, where it is known from Kauaûi and Oûahu.
This plant grows in bogs on Kauaûi and wet mountain habitat in the Koûolau Range on Oûahu.
There are three varieties of this plant. Viola kauaensis var. kauaensis is distributed in bogs and cloud forests in northwestern Kauaûi. Viola kauaensis var wahiawaensis (nani wai`ale`ale) is distributed on Kauaûi. In 2003 there were two populations totalling only 13 individuals. Viola kauaensis var. hosakae is a rare variety on Oahu.