Kapaʻau is an unincorporated community in Hawaii County, Hawaii, United States. Located at the northern tip of the big island of Hawaii, it is celebrated as the birthplace of Kamehameha I.
Kapaʻau is located at 20°14′5″N 155°48′23″W / 20.23472°N 155.80639°W / 20.23472; -155.80639 (20.234711, -155.806361) in the North Kohala District of Hawaii County. It is bordered to the east by Halaula, and Hawi 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 km), of which 74,630 square feet (6,933 m), 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. Hispanic or Latino of any race were 16.65% of the population.
There were 405 households out of which 28.6% had children under the age of 18 living with them, 50.6% were married couples living together, 11.6% had a female householder with no husband present, and 33.3% were non-families. 26.2% of all households were made up of individuals and 17.3% had someone living alone who was 65 years of age or older. The average household size was 2.81 and the average family size was 3.48.
In the CDP the population was spread out with 27.1% under the age of 18, 7.0% from 18 to 24, 22.3% from 25 to 44, 24.4% from 45 to 64, and 19.2% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 94.5 males. For every 100 females age 18 and over, there were 93.4 males.
The median income for a household in the CDP was $45,764, and the median income for a family was $50,703. Males had a median income of $30,694 versus $28,021 for females. The per capita income for the CDP was $17,131. About 4.7% of families and 7.8% of the population were below the poverty line, including 9.8% of those under age 18 and 6.8% of those age 65 or over.