Keauhou is an unincorporated community on the island of Hawaii in Hawaii County, Hawaii, United States. Its elevation is 13 feet. Because the community has borne multiple names, the Board on Geographic Names officially designated it "Keauhou" in 1914. It has a post office with the ZIP code 96739. The post office is a contract station only; people who live in the community use the zip code of 96740 or 96725.