|• Total||35.11 sq mi (90.93 km2)|
|• Land||35.10 sq mi (90.92 km2)|
|• Water||0.01 sq mi (0.02 km2)|
|Elevation||320 ft (100 m)|
|• Density||85.29/sq mi (32.93/km2)|
|Time zone||UTC-10 (Hawaii-Aleutian)|
|GNIS feature ID||359249|
Holualoa's boundaries were altered significantly for the 2020 census. The western portion of the CDP near the coast became part of the neighboring Kailua-Kona CDP, while the eastern portion of Kailua-Kona became part of Holualua. This reduced Holualoa's population to 2,994.
Holualoa is located on the west side of the island of Hawaii at . 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. 23.8% of all households were made up of individuals, and 6.4% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 3.01.
In the CDP the population was spread out, with 21.4% under the age of 18, 6.2% from 18 to 24, 27.6% from 25 to 44, 31.8% from 45 to 64, and 13.0% who were 65 years of age or older. The median age was 42 years. For every 100 females, there were 102.6 males. For every 100 females age 18 and over, there were 100.2 males.
The median income for a household in the CDP was $50,492, and the median income for a family was $52,193. Males had a median income of $37,461 versus $27,733 for females. The per capita income for the CDP was $25,222. About 3.4% of families and 7.8% of the population were below the poverty line, including 7.2% of those under age 18 and 8.9% of those age 65 or over.
- "2020 U.S. Gazetteer Files". United States Census Bureau. Retrieved December 18, 2021.
- "Geographic Identifiers: 2010 Demographic Profile Data (G001): Holualoa CDP, Hawaii". American Factfinder. U.S. Census Bureau. Retrieved May 24, 2017.[dead link]
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "Census of Population and Housing". Census.gov. Retrieved June 4, 2016.
- "U.S. Census website". United States Census Bureau. Retrieved 2008-01-31.
- "Holualoa CDP, Hawaii[permanent dead link]." U.S. Census Bureau. Retrieved on May 12, 2009.