Waià Âhinu (Hawaiian for "Shiny Water") is an unincorporated community and census-designated place (CDP) in the district of Kau on the Big Island of Hawaii, in the U.S. state of Hawaii. Waià Âhinu 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.
As of the 2020 American Community Survey, Waià Âhinu had a population of 220 residents, of whom 50 were Native Hawaiian or other Pacific Islanders, 39 were Asian, 31 were white, and 100 were two or more races. 21 residents were Hispanic or Latino of any race.
Waià Âhinu is at the far southern tip of the island of Hawaii, on Hawaii Route 11, which is part of the Hawaii Belt Road. It is southeast of Kailua-Kona and southwest of Hawaii Volcanoes National Park.
Waiohinu's ZIP code is 96772, which it shares with the nearby community of NÃÂÃÂlehu.
According to the U.S. Census Bureau, the Waià Âhinu CDP has an area of , all of it land.
Mark Twain visited Waià Âhinu in 1866 and, legend has it, planted a monkey pod tree (Albizia saman) here. The tree blew down in 1957, but a shoot from it was replanted, and remains growing there today.
Kauahaao Church was built in 1888 by Calvinist missionaries in Waià Âhinu. The historic wooden church building was demolished in April 1998 because of extensive termite damage.
Wong Yuen Store was built in 1914 by Chinese immigrant Wong Yuen. It is currently the only store in operation in Waià Âhinu.