- Wahiawa is a city located in Honolulu County, on the island of Oahu, in the state of Hawaii, United States. It is situated in the central part of the island and is known for its rural and agricultural character. Wahiawa has a population of approximately 18,000 people and covers an area of 2.6 square miles. The city is surrounded by the Waianae Mountains to the west and the Koolau Mountains to the east. Wahiawa is home to several military facilities, including the Schofield Barracks Army Base and the Wheeler Army Airfield. The city is also known for its cooler and more temperate climate compared to other parts of Oahu, due to its higher elevation. Wahiawa offers a variety of outdoor recreational opportunities, including hiking, fishing, and camping. It is also a hub for transportation, with major highways and bus routes passing through the city.