Halawa is a census-designated place (CDP) in the ‘Ewa District of Honolulu County, Hawaii, United States. Halawa Stream branches into two valleys: North and South Halawa; North Halawa is the larger stream and fluvial feature. Their confluence is within the H-3/H-201 highways exchange. Most of Halawa Valley is undeveloped. As of the 2010 Census, the CDP had a population of 14,014.
Halawa is located at 21°22′39″N 157°55′22″W / 21.37750°N 157.92278°W / 21.37750; -157.92278 (21.377633, -157.922759).
According to the United States Census Bureau, the CDP has a total area of 2.3 square miles (6.0 km), all land.
The route of H-3 extends from its western terminus with east-west Moanalua Freeway (H-201; connecting eastward to Honolulu or westward to H-1 and Aiea) to the 1100-foot (335-m) elevation entrance into the Tetsuo Harano Tunnels, penetrating the Ko‘olau crest. The freeway continues beyond to Kaneohe on windward Oahu.
A significant proportion of H-3 within the valley is carried on the Windward Viaducts; although very expensive to construct, the viaduct is the only way to construct a freeway of this magnitude through such a narrow valley without flooding and destabilization concerns; it is also believed to offer some returns in terms of preservation of both archeological sites and stream ecology.
As of the census of 2000, there were 13,891 people, 4,142 households, and 3,276 families residing in the CDP. The population density was 5,974.5 inhabitants per square mile (2,301.9/km²). There were 4,289 housing units at an average density of 1,844.7 per square mile (710.7/km²). The racial makeup of the CDP was 15.50% White, 1.83% African American, 0.20% Native American, 50.90% Asian, 10.43% Pacific Islander, 0.84% from other races, and 20.31% from two or more races. Hispanic or Latino of any race were 6.52% of the population.
There were 4,142 households out of which 30.3% had children under the age of 18 living with them, 60.1% were married couples living together, 13.9% had a female householder with no husband present, and 20.9% were non-families. 15.5% of all households were made up of individuals and 5.2% had someone living alone who was 65 years of age or older. The average household size was 3.28 and the average family size was 3.64.
In the CDP the population was spread out with 23.4% under the age of 18, 9.9% from 18 to 24, 28.3% from 25 to 44, 22.6% from 45 to 64, and 15.8% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 98.8 males. For every 100 females age 18 and over, there were 98.3 males.
The median income for a household in the CDP in 2000 was $63,176, and the median income for a family was $68,519. Males had a median income of $35,764 versus $28,527 for females. The per capita income for the CDP was $21,868. About 7.5% of families and 10.1% of the population were below the poverty line, including 20.9% of those under the age of 18 and 3.7% of those 65 and older.