Kapaau (Hawaiian: Kapaʻau) is an unincorporated community in Hawaiʻi County, Hawaii, United States. Located at the northern tip of the big island of Hawaiʻi, it is celebrated as the birthplace of Kamehameha I.
For statistical purposes, the United States Census Bureau has defined Kapaau as a census-designated place (CDP). The census definition of the area may not precisely correspond to local understanding of the area with the same name. The population was 1,734 at the 2010 census, up from 1,159 at the 2000 census.
Kapaau is located at 20°14′5″N 155°48′23″W (20.234711, -155.806361) in the North Kohala District of Hawaiʻi County. It is bordered to the east by Halaʻula, and Hāwī is 2 miles (3 km) to the west. Hawaii Route 270 is the main road through the community.
According to the United States Census Bureau, the Kapaau CDP has a total area of 2.9 square miles (7.4 km2), of which 74,630 square feet (6,933 m2), or 0.09%, are water.
As of the census of 2000, there were 1,159 people, 405 households, and 270 families residing in the CDP. The population density was 536.1 people per square mile (207.2/km2). There were 443 housing units at an average density of 204.9 per square mile (79.2/km2). The racial makeup of the CDP was 23.47% White, 0.09% African American, 0.09% Native American, 27.44% Asian, 9.32% Pacific Islander, 1.73% from other races, and 37.88% from two or more races.