Halawa is a census-designated place 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 2020 census, the CDP had a population of 15,016. Camp H. M. Smith, the headquarters of the United States Indo-Pacific Command, is located here.