Euphorbia haeleeleana, the Kauai spurge, is a species of flowering plant in the croton family, Euphorbiaceae, that is endemic to the islands of Kauai and Oahu in Hawaii. Like other Hawaiian spurges it is known as akoko.
It inhabits dry, coastal mesic, and mixed mesic forests from . Associated plants include à Âhia lehua (Metrosideros polymorpha), koa (Acacia koa), lama (Diospyros sandwicensis), kukui (Aleurites moluccanus), aalii (Dodonaea viscosa), wiliwili (Erythrina sandwicensis), hala pepe (Dracaena spp.), ohe kukuluÃÂeo (Reynoldsia sandwicensis), and ÃÂulu (Sapindus oahuensis). Kauai Spurge is a small tree, reaching a height of .
It is threatened by habitat loss and disturbance. Feral pigs and goats damage the habitat and non-native plant species take hold there and compete for resources.