Hau?ula is a census-designated place and rural community in the Ko?olauloa District on the island of O?ahu, City & County of Honolulu. In Hawaiian, hau?ula means "red hau". There is a small commercial center. As of the 2010 Census, the CDP population was 4,148.A fringing reef extends off the shoreline. There are several beaches and beach parks in Hau?ula, including Hau?ula Beach Park, ?Aukai Beach Park, Kokololio Beach Park, and Mahakea Beach. Sugarcane was once grown along the narrow coastal plain inland from the highway.The U.S. postal code for Hau?ula is 96717. There is a two-bay fire station located on Kamehameha Highway.