Waiʻōhinu (Hawaiian: Waiʻōhinu; translation: "Shiny Water") is an unincorporated community and census-designated place (CDP) in the district of Kaʻu on the Big Island of Hawaiʻi, in the U.S. state of Hawaiʻi. Waiʻōhinu is the name of the community as well as the ahupua'a, Native Hawaiian subdivision. As of the 2020 census, the CDP had a population of 198.