Holualoa (Hawaiian: Hōlualoa) is a census-designated place (CDP) in Hawaii County, Hawaii, United States. The population was 8,538 at the 2010 census, up from 6,107 at the 2000 census.
Holualoa is located on the west side of the island of Hawaii at 19°36′59″N 155°58′06″W. It is bordered by Kailua to the north, Honalo and Kahaluu-Keauhou to the south, and the Pacific Ocean to the west. Hawaii Route 11 is the main highway through the community, running north–south, and Hawaii Route 180 runs parallel to it farther inland.
According to the United States Census Bureau, the CDP has a total area of 14.4 square miles (37.2 km2), of which 13.2 square miles (34.2 km2) are land and 1.2 square miles (3.0 km2), or 7.99%, are water.
As of the census of 2000, there were 6,107 people, 2,383 households, and 1,560 families residing in the CDP. The population density was 431.6 people per square mile (166.6/km2). There were 3,330 housing units at an average density of 235.3 per square mile (90.9/km2). The racial makeup of the CDP was 55.51% White, 0.59% African American, 0.54% Native American, 17.11% Asian, 7.63% Pacific Islander, 1.49% from other races, and 17.13% from two or more races. Hispanic or Latino of any race were 7.35% of the population.
There were 2,383 households, out of which 26.5% had children under the age of 18 living with them, 51.9% were married couples living together, 8.9% had a female householder with no husband present, and 34.5% were non-families.