Pearl City is an unincorporated community and census-designated place (CDP) located in the Ewa District and City & County of Honolulu on the Island of Oahu. As of the 2010 Census, the CDP had a total population of 47,698. Pearl City is located along the north shore of Pearl Harbor. Waimalu borders Pearl City to the east, while Waipahu borders the west. The U.S. postal code for Pearl City is 96782.